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physics

Total questions: 173

Worksheet time: 3hrs 22mins

Name
Class
Date
1.

____ is one of the best reflectors of light.

a)

Gold

b)

Silver

c)

Brass

d)

Aluminium

2.

Reflection of light have___laws.

a)

1

b)

2

c)

3

d)

4

3.

When light is available which image is formed.

a)

Real

b)

Virtual

c)

Erect

4.

If an object is placed at a distance of 10 cm in front of a plane mirror how far would it be from its image.

a)

10cm

b)

20cm

c)

30cm

d)

40cm

5.

Which mirror has a wider field of view?

a)

Convex

b)

Concave

c)

Plane

6.

Which equation related to ohm's law?

a)

V=IR

b)

R=V/I

c)

I=V/R

d)

All of the above

7.

When an obj is placed at focus then which type of image is formed?

a)

Real

b)

Virtual

c)

Inverted

d)

Both (1)and (3)

8.

A ray of light is incident on a plane mirror at an angle of 30°.what is the angle of refrection?

a)

10°

b)

20°

c)

30°

d)

40°

9.

Which type of image formed by plane mirror?

a)

Same size

b)

Erect

c)

Virtual

d)

All of the above

10.

Real image is always

a)

Erect

b)

Real

c)

Inverted

d)

Virtual

11.

What is nature of the image

(a)  

12.

Which factor does not affect resistivity?

a)

Length

b)

Mass

c)

Cross-sectional area

d)

Temperature

13.

The unit of resistivity is

a)

Ω/m

b)

Ω/m2

c)

Ω.m

d)

Ω.m2

14.

The nichrome wire has a cross-sectional area of 1.3 × 10–7 m2 . Resistivity of nichrome = 1.1 × 10–6Ωm and a resistance of 53Ω. The length of the wire is

a)

0.63m

b)

63m

c)

0.0063m

d)

6.3m

15.

Resistance of a material would be equal to resistivity when

a)

l = T

b)

A = l

c)

A = T

d)

l = R

16.

A wire of uniform diameter 0.28mm and a length of 1.50m has a resistance of 45Ω. It's resistivity is

a)

2.2 x 10-8Ωm

b)

36 Ωm

c)

1.8 x 10-6Ωm

d)

3.4 x 10-7Ωm

17.
Which copper wire has the lowest resistance?
a)
1 metre of 1 mm diameter wire
b)
0.5 metre of 1 mm diameter wire
c)
0.5 metre of 0.5 mm diameter wire
d)
1 metere of 0.5 mm diameter wire
18.
What happens to a resistor when the temperature is increased?
a)
Increases
b)
decreases
c)
stay the same
d)
vary randomly
19.
Graph shows that _____________
a)
Resistance is directly proportional to Area
b)
Resistance is inversely proportional to Area
c)
Resistance is a constant while Area changes.
d)
Area is a constant while resistance changes.
20.
which has the highest current flowing through it?
a)
R1
b)
R2
c)
R3
d)
All the same
21.

Two resistors R1 and R2 are made of wires of the same material. The wire used for R1 has half the diameter and is twice as long as the wire used for R2.

What is the value of the ratio resistance of R1 / resistance of R2?

a)

8

b)

4

c)

1

d)

0.5

22.

What is the SI unit of resistivity?

a)

ohm

b)

ohm meter

c)

metre

d)

none of these

23.

What will be the resistivity of a metal wire of 2 m length and 0.6 mm in diameter, if the resistance of the wire is 50 Ω.

a)

4.045 ×10−8Ωm

b)

7.065 ×10−8Ωm

c)

7.065 ×10−6Ωm

d)

4.045 ×10−6Ωm

24.

The resistance of an electric wire of an alloy is 10 Ω. If the thickness of wire is 0.001 meter, and length is 1 m, find its resistivity.

a)

10−6Ωm

b)

10Ωm

c)

7.85 x 10−4Ωm

d)

None of these

25.

The resistivity of a metal wire is 10 x 10−8 Ω m at 20°C. Find the resistance of the same wire of 2 meter length and 0.3 mm thickness.

a)

3.825 Ω

b)

0.26 Ω

c)

0.66 Ω

26.

What are the factors affecting resistance of the wire?

a)

Area of cross section

b)

Length of wire

c)

Nature of wire

d)

All of above

27.

A wire with least resistivity is a ...................

a)

Bad conductor

b)

Good conductor

c)

Information is not sufficient

d)

None of these

28.
Factor which does not affect the resistance
a)
Type of material
b)
Length of material
c)
Mass of the material
d)
Area of the material
29.
Thicker wires have _______ resistance than thinner wires.
a)
more
b)
less
c)
the same
30.
Electric current is measured in ______.
a)
Watts
b)
Volts
c)
Amperes
31.
As the resistance in a circuit increases, the electric current __________.
a)
increases
b)
decreases
c)
stays the same
32.
Which formulas represents Ohm's law?
a)
V=IR
b)
R=IV
c)
I=RV
33.
An accumulation of electrons on an object is known as ___________.
a)
current
b)
AC
c)
static electricity
34.
How many volts are in a circuit with a battery that has a resistance of 10 Ohms and a current of 2 Amps? 
a)
.5 Volts
b)
5 Volts
c)
20 Volts
35.
What type of circuit is pictured?
a)
series
b)
parallel
36.
Which type of current comes from a battery?
a)
alternating current (AC)
b)
direct current (DC)
37.
What does a resistor do? 
a)
Reduces the flow of electrons
b)
Reduce the flow of the current
c)
Increase flow of electrons
d)
Decreases the flow of electrons 
38.
Which of the following is not a source of electricity 
a)
Windmills
b)
Batteries
c)
wires
d)
Hydroelectric dams
39.
In a parallel circuit with 2 lightbulbs, if you take out one lightbulb what will happen to the rest?
a)
They will all go out.
b)
The other one will stay on 
40.

In a series circuit what happens when you add another bulb?

a)

The bulbs gets brighter

b)

The bulbs gets dimmer

c)

Nothing changes

41.
What resistance is needed to cause a 20A current flow because of a 100V battery?
a)
0.2Ώ
b)
2000Ώ
c)
120Ώ
d)
5Ώ
42.
A circuit made of wires, a lamp, a switch, and a cell is shown at the right. What change is needed for the lamp to glow? 
a)
The switch needs to be opened.
b)
The switch needs to be closed.
c)
The cell needs an insulator.
d)
The wire needs to be connected to the bottom of the cell.
43.
Which statement best explains why the lamp does not glow? 
a)
Circuit 1 is an open circuit.
b)
 Circuit 1 is a closed circuit.
c)
 The negative terminal of Circuit 1 is connected to the cell.
d)
The positive terminal of Circuit 1 is connected to the cell.
44.

If the light bulb in the middle burned out, what would happen to the other two?

a)

The light bulb to the left would stay lit, but the one to the right would turn off.

b)

They would both stay lit.

c)

The light bulb to the right would stay lit, but the one to the left would turn off.

d)

They would both turn off.

45.

1 coulomb charge is equivalent to_____

a)

2.6 x 1019 electron

b)

6.2 x 1019 electron

c)

2.65 x 1019 electron

d)

6.25 x 1018 electron

46.

Electrical resistivity of a given metallic wire depends upon

a)

length

b)

thickness

c)

shape

d)

nature of material

47.

A current of 1 A is drawn by a filament of an electric bulb. Number of electrons passing through a cross section of the filament in 16 seconds would be roughly

a)

1020

b)

1016

c)

1018

d)

1023

48.

What is the maximum resistance which can be made using five resistors each of 1/5 Ω?

a)

1/5 Ω

b)

10 Ω

c)

5 Ω

d)

1 Ω

49.

A cylindrical conductor of length 'l' and uniform area of cross section A has resistance 'R'. Another conductor of length '2l' and resistance 'R' of the same material has area of cross section ?

a)

A/2

b)

3A/2

c)

2A

d)

3A

50.

A student carries out an experiment and plots

the V-I graph of three samples of nichrome wire

with resistances R1, R2 and R3 respectively. Which of the following is true?

a)

R1 = R2 = R3

b)

R1 > R2 > R3

c)

R3 > R2 > R1

d)

R2 > R3 > R

51.

The resistivity does not change if

a)

the material is changed

b)

the temperature is changed

c)

the shape of the resistor is changed

d)

both material and temperature are changed

52.

In an electrical circuit three incandescent bulbs A, B and C of rating 40 W, 60 W and 100 W respectively are connected in parallel to an electric source. Which of the following is likely to happen regarding their brightness?

a)

Brightness of all the bulbs will be the same

b)

Brightness of bulb A will be the maximum

c)

Brightness of bulb B will be more than that of A

d)

Brightness of bulb C will be less than that of B

53.

In an electrical circuit two resistors of 2 Ω and 4 Ω respectively are connected in series to a 6 V battery. The heat dissipated by the 4 Ω resistor in 5 s will be

a)

5 J

b)

10 J

c)

20 J

d)

30 J

54.

An electric kettle consumes 1 kW of electric power when operated at 220 V. A fuse wire of what rating must be used for it?

a)

1 A

b)

2 A

c)

4 A

d)

5 A

55.

Two resistors of resistance 2 Ω and 4 Ω when connected to a battery will have

a)

same current flowing through them when connected in parallel

b)

same current flowing through them when connected in series

c)

same potential difference across them when connected in

series

d)

different potential difference across them when connected in

parallel

56.

Unit of electric power may also be expressed as

a)

volt ampere

b)

kilowatt hour

c)

watt second

d)

joule second

57.

the substance which has infinitely high resistance is called

a)

conductor

b)

resistor

c)

semiconductor

d)

insulator

58.

relation between resistivity and area of cross section

a)

directly proportional

b)

indirectly proportional

c)

both are equal

d)

resistivity does not depend on area of cross section

59.
  1. The resistance whose V-I graph is given below is
a)

5/3 Ohm

b)

3 /5 Ohm

c)

5 / 2 Ohm

d)

2 / 5 Ohm

60.

2.To get 2 Ω resistance using only 6 Ω resistors, the number of them required is

a)

2

b)

3

c)

4

d)

6

61.

If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then

a)

R1 < R2

b)

R2 < R1

c)

R1 = R2

d)

R1 ≥ R2

62.

what is A on the diagram?

a)

center of curviture

b)

focal length

c)

reflected ray

d)

focal point

63.
The following is a picture of what type of mirror? 
a)
Convex Mirror
b)
Concave Mirror
c)
Plane Mirror
d)
Flat Mirror
64.
The following is a picture of what type of mirror? 
a)
Convex Mirror
b)
Concave Mirror
c)
Plane Mirror
d)
Flat Mirror
65.
This is an example of a __________ mirror.
a)
Concave
b)
Convex
c)
Plane
d)
Magnifying
66.

Which device uses refraction to converge light?

a)
b)
c)
d)
67.

Which device uses reflection to diverge light?

a)
b)
c)
d)
68.

People who are into the mystic arts say to never leave a crystal ball uncovered while you aren't home to prevent evil spirits. Actually, you should always keep a crystal ball covered to prevent house fires! Why?

a)

Because a crystal ball acts like a diverging lens.

b)

Because a crystal ball acts like a converging lens.

c)

Because a crystal ball acts like a diverging mirror.

d)

Because a crystal ball acts like a converging mirror.

69.

How could a convex lens cause house fires?

a)

Because it creates an upright image of the sun.

b)

Because it could cause all the sunlight to diverge away from a single spot.

c)

Because it could project a virtual image of the sun.

d)

Because it could cause all the sunlight to converge on a single point.

70.

Which ray diagram shows a real image?

a)
b)
c)
d)

None of the above

71.

Four ray diagrams show the images formed in mirrors and lenses. Which shows a virtual image?

a)
b)
c)
d)
e)

All of the above.

72.

This gif best shows

a)

that images are always largest when an object is near the focal point

b)

that images are always virtual for converging mirrors

c)

that images are always larger for converging mirrors

d)

that images are smallest when the object is on the focal point

73.

Based on this picture, what is known about the focal length of this device?

a)

f is positive

b)

f is negative

c)

there is no focal length of this device

d)

there is not enough information to determine

74.
What is the incident ray?
a)
The ray of light leaving the mirror
b)
The ray of light approaching the mirror
75.
Refract or Reflect?
a)
Refract
b)
Reflect
76.
Which terms describe the reflection seen in this image?
a)
virtual, upright
b)
virtual, inverted
c)
real, upright
d)
real, inverted
77.
What type of image is produced by a flat mirror?
a)
Real and upright
b)
Real and inverted
c)
Virtual and upright
d)
Virtual and inverted
78.
According to the Law of reflection, a light ray striking a mirror
a)
continues moving through the mirror in the same direction
b)
moves into the mirror at a slightly different angle
c)
bounces off the mirror toward the direction it came from
d)
bounces off the mirror at the same angle it hits.
79.
Convex mirrors can create virtual and real images.
a)
True
b)
False
80.
What kind of lens is a magnifying glass?
a)
Convex Lens
b)
Concave Lens
81.
Glass has a _____________ index of refraction than air.
a)
Equal
b)
Greater
c)
Less
d)
Impossible to say
82.

Type of mirror used as a side mirror on a vehicle to provide a wide angle view...

a)

Plane

b)

Convex

c)

Concave

83.

Type of mirror used by a dentist to get magnified view of a patient's teeth...

a)

Plane

b)

Convex

c)

Concave

84.

An image behind the mirror is...

a)

virtual

b)

real

c)

inverted

d)

upright

85.

If the object is beyond C (2F)...

a)

image is real, smaller and inverted

b)

image is real, smaller and upright

c)

image is virtual, smaller and inverted

d)

image is real, bigger and upright

86.

This ray diagram is for which mirror?

a)

concave

b)

convex

c)

plane

d)

window

87.

In the image, all the rays meet at F, What is F

a)

focal length

b)

focal point

c)

center of curvature

d)

reflection

88.

This image is showing a convex mirror because the image is (choose 2 answers)

a)

real light rays meet behind the mirror

b)

real light rays don't meet

c)

the focal point is in front of the mirror

d)

the focal point is behind the mirror

89.

This type of mirror is used in supermarkets to see around bends

a)

concave

b)

convex

c)

plane

d)

window

90.

A dentist uses a small dental mirror to help magnify teeth in your mouth. What type of mirror is this?

a)

a convex mirror

b)

a concave mirror

c)

a convex lens

d)

a concave lens

91.
In a concave mirror, if an incident ray passes through F and hits the mirror then it will reflect
a)
Towards C
b)
Towards F
c)
Parallel
d)
Away from the mirror
92.

An object is at a distance of 36cm from a concave mirror of focal length 12 cm. Find the image distance

a)

18cm

b)

-18cm

c)

12 cm

d)

-12 cm

93.

22. An object is placed at the centre of curvature of a concave mirror. The distance between its image and the pole is

a)

(a) equal to f

b)

(b) between f and 2f

c)

(c) equal to 2f

d)

greater than 2f

94.

Which is the angle of Incidence?

a)

A

b)

B

c)

C

d)

D

95.

Can reflected ray and incident ray be on the same side of the normal?

a)

Yes

b)

No

c)

I'm not sure

96.

Can reflected ray and incident ray be on the normal?

a)

Yes

b)

No

c)

I'm not sure

97.

An image ...

a)

Can be touched

b)

Can't be touched

c)

I'm not sure

98.

The normal is ____ to the mirror

a)

Perpendicular

b)

Parallel

c)

Perpendicular and Parallel

d)

None of the above

99.

What is reflection?

a)

Light bouncing off a smooth surface

b)

Light absorbing into a smooth surface

c)

Light bending off a smooth surface

d)

Light scattering off a smooth surface

100.

How do light waves travel in air?

a)

Slowly

b)

It curves

c)

In straight lines

d)

Different colours have different speeds

101.

What uses reflection

a)
b)
c)
d)
102.

Which is right ?

a)
b)
c)

I'm not sure

103.

Which is not a light source?

a)
b)
c)
d)
104.

An image behind the mirror is...

a)

virtual

b)

real

c)

inverted

d)

upright

105.

An image that points below the principal axis is (choose 2)...

a)

virtual

b)

real

c)

upright

d)

inverted

106.

If the object is beyond C (2F)...

a)

image is real, smaller and inverted

b)

image is real, smaller and upright

c)

image is virtual, smaller and inverted

d)

image is real, bigger and upright

107.

This ray diagram is for which mirror?

a)

concave

b)

convex

c)

plane

d)

window

108.

In the image, all the rays meet at F, What is F

a)

focal length

b)

focal point

c)

center of curvature

d)

reflection

109.

This image is showing a convex mirror because the image is (choose 2 answers)

a)

real light rays meet behind the mirror

b)

real light rays don't meet

c)

the focal point is in front of the mirror

d)

the focal point is behind the mirror

110.

This type of mirror is used in supermarkets to see around bends

a)

concave

b)

convex

c)

plane

d)

window

111.
Convex Mirrors produce...
a)
only virtual images
b)
virtual or real images
c)
only real images
d)
inverted images
112.

Real images are :

a)

Always inverted

b)

can be larger or smaller than the object

c)

can be obtained on screen

d)

all the above

113.

A dentist uses a small dental mirror to help magnify teeth in your mouth. What type of mirror is this?

a)

a convex mirror

b)

a concave mirror

c)

a convex lens

d)

a concave lens

114.

The side view mirrors on your car help shrink the image on both sides of the car, allowing you to see a larger field of view. What type of mirror is this?

a)

a convex mirror

b)

a concave mirror

c)

a convex lens

d)

a concave lens

115.

An image that forms when light rays actually meet

a)

virtual image

b)

real image

c)

diffuse reflection

d)

regular reflection

116.
The point in the middle way between a curved mirror and the center of curvature is the
a)
principle point
b)
focal point
c)
center of curvature
d)
principle axis
117.
In a concave mirror, if an incident ray passes through F and hits the mirror then it will reflect
a)
Towards C
b)
Towards F
c)
Parallel
d)
Away from the mirror
118.

Virtual images are

a)

always upright

b)

can be obtained on screen

c)

always smaller

119.
Concave mirrors can create virtual and real images.
a)
True
b)
False
120.
Convex mirrors can create real images.
a)
True
b)
False
121.
Which terms describe the reflection seen in this image?
a)
virtual, upright
b)
virtual, inverted
c)
real, upright
d)
real, inverted
122.

If the object is between C and f, the image is ...

a)

image is real, smaller, and inverted

b)

image is real, smaller, and upright

c)

image is virtual, smaller, and inverted

d)

image is real, bigger, and inverted

123.

If the object is between f and the mirror, the image is ...

a)

image is real, smaller, and inverted

b)

image is virtual, larger, and upright

c)

image is virtual, smaller, and inverted

d)

image is real, bigger, and inverted

124.

Images in a plane mirror are

a)

real

b)

larger

c)

same size

d)

smaller

125.
What is an image called that forms when light rays actually meet
a)
virtual image
b)
real image
c)
diffuse reflection
d)
regular reflection
126.
What is an image called that forms where light seems to come from
a)
virtual image
b)
real image
c)
diffuse reflection
d)
regular reflection
127.

The ray of light that strikes a mirror

a)

Reflected Ray

b)

Incidence Ray

c)

Angle of Incidence

d)

Angle of Reflection

128.

The ray that bounces off the mirror.

a)

Angle of Reflection

b)

Incidience Ray

c)

Reflected Ray

d)

Angle of Reflection

129.

The angle between the incident ray and the normal. (X on the diagram)

a)

Angle of X-Ray

b)

Angle of Reflection

c)

Angle of Incidence

d)

Angle of Normal

130.

Given that the angle of incidence = 30 degrees


Which is the correct diagam?

a)

A

b)

B

c)

C

d)

D

131.

image above the principal axis (PA) is

a)

virtual

b)

real

c)

upright

d)

upside down

132.

This ray diagram is for which mirror?

a)

concave

b)

convex

c)

plane

d)

window

133.

In the image, all the rays meet at F, What is F

a)

focal length

b)

focal point

c)

center of curvature

d)

reflection

134.

The angle of incidence is equal to the angle of reflection

a)

Law of Reflection

b)

Law of Light

c)

Incidence Ray

d)

The Normal

135.

A shopkeeper wants to keep an eye on his store in order to prevent shoplifting. What could the shopkeeper hang on the wall in order to see a wider image of his store and his customers?

a)

a convex mirror

b)

a concave mirror

c)

a convex lens

d)

a concave lens

136.

A dentist uses a small dental mirror to help magnify teeth in your mouth. What type of mirror is this?

a)

a convex mirror

b)

a concave mirror

c)

a convex lens

d)

a concave lens

137.

The side view mirrors on your car help shrink the image on both sides of the car, allowing you to see a larger field of view. What type of mirror is this?

a)

a convex mirror

b)

a concave mirror

c)

a convex lens

d)

a concave lens

138.
Convex Mirrors produce...
a)
only virtual images
b)
virtual or real images
c)
only real images
d)
inverted images
139.
Which terms describe the reflection seen in this image?
a)
virtual, upright
b)
virtual, inverted
c)
real, upright
d)
real, inverted
140.
An object is placed 10 cm from a convex mirror. Its image is formed 5 cm behind the mirror.The focal length of the given convex mirror is
a)
-5 cm
b)
5 cm
c)
10 cm
d)
-10cm
141.
A real image having a size of 10 cm is formed by a concave mirror. The size of the object is 5 cm.The magnification of the object is
a)
-5
b)
5
c)
2
d)
-2
142.

The angle between the reflected ray and the normal. (X on the diagram)

a)

Angle of X-Ray

b)

Angle of Reflection

c)

Angle of Incidence

d)

Angle of Normal

143.

Which mirror type can produce real and virtual images?

a)

plane

b)

concave

c)

convex

144.

Which is the angle of Incidence?

a)

A

b)

B

c)

C

d)

D

145.

Can reflected ray and incident ray be on the same side of the normal?

a)

Yes

b)

No

c)

I'm not sure

146.

Can reflected ray and incident ray be on the normal?

a)

Yes

b)

No

c)

I'm not sure

147.

An image ...

a)

Can be touched

b)

Can't be touched

c)

I'm not sure

148.

The normal is ____ to the mirror

a)

Perpendicular

b)

Parallel

c)

Perpendicular and Parallel

d)

None of the above

149.

What is reflection?

a)

Light bouncing off a smooth surface

b)

Light absorbing into a smooth surface

c)

Light bending off a smooth surface

d)

Light scattering off a smooth surface

150.

How do light waves travel in air?

a)

Slowly

b)

It curves

c)

In straight lines

d)

Different colours have different speeds

151.

What uses reflection

a)
b)
c)
d)
152.

Which is right ?

a)
b)
c)

I'm not sure

153.

Which is not a light source?

a)
b)
c)
d)
154.

Bouncing of a light ray when it strikes a reflecting surface is called.........

a)

Refraction

b)

Dispersion

c)

Reflection

d)

Diffraction

155.

which of the following is not a property of the image formed by a [lane mirror?

a)

virtual and erect

b)

Object size = image size

c)

object distance = image distance

d)

Real and inverted

156.

Which of the following is a concave mirror?

a)
b)
c)
d)
157.

Four students A, B, C and D performed the experiment to determine the focal length of a concave mirror by obtaining the image of a distant tree on a screen. They measured the distances between the screen and the mirror as shown in the above figure.

The correct way of measuring accurate focal length of the mirror is

a)

A

b)

B

c)

C

d)

D

158.

which of the following ray diagrams is correct for the ray of light incident on a concave mirror as shown in the figure 10.6?

a)

A

b)

B

c)

C

d)

D

159.

Convex mirror is also called as

a)

converging mirror

b)

diverging mirror

c)

plane mirror

d)

silver mirror

160.

The relation between focal length and radius of curvature is

a)

R = 2f

b)

1/f = 2R

c)

f = R/2

d)

R = 2/f

161.

The point on the spherical mirror at the middle of the surface is called

a)

focus

b)

centre of curvature

c)

pole

d)

radius of curvature

162.

The focal length of a plane mirror is ........

a)

infinite

b)

zero

c)

1m

d)

100m

163.

A convex mirror has a focal length 12 cm. Then its radius of curvature is ........ cm

a)

24

b)

12

c)

6

d)

1.2

164.

When the object is in between the centre of curvature (C) and focus (F) of a concave mirror, then the position of the image is ...........

a)

At focus

b)

At the centre of curvature

c)

at infinity

d)

beyond the centre of curvature

165.

Which of the following characteristic of an image formed for a convex mirror?

a)

Enlarged size

b)

virtual image

c)

Real image

d)

inverted image

166.

Which mirror is shown in the figure?

a)

convex mirror

b)

concave mirror

c)

plane mirror

d)

silver mirror

167.

Mirror formula is defined as ........

a)

A

b)

B

c)

C

d)

D

168.

When the object is at infinity, a point sized image is formed at ................ by the convex mirror

a)

focus behind the mirror

b)

focus in front of the mirror

c)

radius of curvature

d)

principal axis

169.

The image formed by a concave mirror when the object is placed between the pole and the focus is ......

a)

virtual, erect and magnified

b)

virtual, erect and diminished

c)

real, inverted and magnified

d)

real, inverted and diminished

170.

The angle of incidence of a ray of light passing through the centre of curvature of a concave mirror is ........... degree

a)

105

b)

180

c)

90

d)

0

171.

According to laws of reflection,

a)

angle of incidence > angle of reflection

b)

angle of incidence < angle of reflection

c)

angle of incidence = angle of reflection

d)

both 1 and 2

172.

Where will be the images of the Sun or the moon are formed by a concave mirror?

a)

Focus

b)

Pole

c)

centre of curvature

d)

beyond centre of curvature

173.

What is the size of the image formed when an object is kept at the focus in front of concave mirror?

a)

enlarged

b)

diminished

c)

highly enlarged

d)

highly diminished

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9th - 12th Grade