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Worksheets

Grade 11 2nd term final revsion

Total questions: 80

Worksheet time: 2hrs 53mins

Name
Class
Date
1.

What do we call a material that light can travel through?

a)

air

b)

water

c)

medium

d)

pathway

2.
The illustration shows a light ray striking an object.
In the illustration, the light ray striking the object is-
a)
absorbed
b)
stopped
c)
reflected
d)
refracted
3.

What is the angle of reflection equal to?

a)

The angle of refraction

b)

The angle of incidence

c)

The angle of absorption

d)

The angle of light

4.
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.
5.

A light ray is incident from water to air. Which of the refracted rays is correct?

a)

A

b)

B

c)

C

d)

D

6.

Refraction happens because light travels _____________ in glass or water compared to air

a)

Faster

b)

The same

c)

At the speed of sound

d)

Slower

7.

A convex lens produces a _______ image whereas a concave lens produces a _______ image

a)

Virtual, real

b)

Virtual; diffused

c)

Real; refracted

d)

Real; virtual

8.

Which of the following is a concave mirror?

a)
b)
c)
d)
9.

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

10.

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

11.

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

12.

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

a)

infinite

b)

zero

c)

1m

d)

100m

13.

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

14.

Which mirror is shown in the figure?

a)

convex mirror

b)

concave mirror

c)

plane mirror

d)

silver mirror

15.

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

a)

A

b)

B

c)

C

d)

D

16.

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

17.

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

18.

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

19.

A concave mirror

a)

Curves inwards

b)

Curves outwards

c)

Curves sideways

d)

Curves in multiple directions

20.

A convex mirror

a)

Curves inwards

b)

Curves outwards

c)

Curves sideways

d)

Curves in multiple directions

21.

If a mirror is 10 cm tall, how much of yourself can you see in the mirror?

a)

5 cm

b)

10 cm

c)

15 cm

d)

20 cm

22.

Images in a plane mirror are

a)

real

b)

larger

c)

same size

d)

smaller

23.

The distance from the reflecting surface to the photographic film is the

a)

focal length.

b)

radius of curvature.

c)

object distance.

d)

image distance.

24.
A student placed a pencil in a cup of water.  The pencil appears broken because light-
a)
always travels in a straight line
b)
bends when it passes through water
c)
makes the water in the glass evaporate
d)
reflects the pencil on the water's surface
25.
a)
Reflection
b)
Refraction
26.

If the angle of incidence in the diagram is 80°, the angle of reflection will be:

a)

10°

b)

100°

c)

90°

d)

80°

27.
Spherical mirrors are part of a 
a)
Rectangle
b)
Cube
c)
Sphere
d)
Biryani
28.
a mirror with a surface that curves inward like the inside of a bowl
a)
concave mirror
b)
convex mirror
c)
plane mirror
d)
flat mirror
29.
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
30.
The line that passes through the center of a curved mirror is called
a)
focal point
b)
center of curvature 
c)
principle axis
d)
light ray
31.
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
32.

A car’s headlight uses __________.

a)

Plane mirror

b)

Convex mirror

c)

Concave mirror

d)

None of the above

33.
What does the word "converging" mean?
a)
to separate
b)
to come together
c)
parallel 
d)
perpendicular
34.
What does the word "diverging" mean?
a)
to spread apart
b)
to come together
c)
parallel
d)
perpendicular
35.
The point where the rays meet is known as....
a)
Fire
b)
the focal point
c)
refraction
d)
Plane of the lens
36.
Is a convex lens thicker or thinner in the middle?
a)
Thicker 
b)
Thinner 
37.
What type of lens do humans have in their eyes? 
a)
Concave Lens 
b)
Convex Lens 
38.

An object is located 35.0 cm from a diverging lens. The lens forms an image at a distance of 15.0 cm. What is the focal length?

a)

28.25 cm

b)

10.5 cm

c)

26.25 cm

d)

-10.5 cm

39.
The focal length of the lens in your eye is about 0.015 m. If the object is 1 m from your eye, where is the image produced? 
a)

0.0315 m

b)

0.0243 m

c)

0.0152 m

d)

0.0147 m

40.
A normal human eye has a focal length of about 0.023 m. If you look at the tip of a pencil, 0.553 m from your eye, how far is the image from the lens of your eye? 
a)

0.022 m

b)

0.033 m

c)

0.045

d)

0.055

41.
An ant measures 2 mm in length.  If it is observed at 20x magnification, what length should the scale bar be drawn at?
a)
40 mm
b)
10 mm
c)
4 mm
d)
0.1 mm
42.
To calculate magnification we use......
a)
image size x actual size
b)
image size ÷ actual size
c)
actual size ÷ image size
43.

a device that is not efficient

a)

heating appliance

b)

thermostat

c)

refrigerator

d)

heat engine

44.

a device that uses electric energy to pump thermal energy from a cooler location to a warmer location.

a)

heating appliance

b)

thermostat

c)

refrigerator

d)

heat engine

45.

a machine that converts thermal energy into mechanical energy

a)

heating appliance

b)

thermostat

c)

refrigerator

d)

heat engine

46.

If heat added to the cycle is 40 kJ and the one rejected is 20 kJ then the efficiency of the cycle will be

a)

40%

b)

50%

c)

60%

d)

100%

47.

In a heat engine, 750J is drawn from the hot reservoir, and 400J is released to the cold reservoir.

How much work is done by the engine?

a)

300 J

b)

350 J

c)

1150 J

d)

0

48.

A heat engine does a work of 220J when receiving 600J of heat. How much energy is emitted through the exhaust?

a)

380 J

b)

820 J

c)

480 J

d)

880 J

49.

Total energy = 200J
Useful energy = 20J

Workout the efficiency of this lightbulb.
efficiency = useful enegytotal energy in ×100efficiency\ =\ \frac{useful\ enegy}{total\ energy\ in}\ \times100  

a)

100%

b)

80%

c)

40%

d)

10%

50.
What is the SI unit for temperature?
a)
Kelvin
b)
Celcius
c)
Fahrenheit
d)
All of these
51.
A colorless, odorless gas that decreases the blood's ability to carry oxygen.  Can cause faintness, death.
a)
Nitrogen oxides
b)
Ground-level ozone
c)
Carbon monoxide
d)
Sulfur dioxide
52.

______________ ______________ is produced when fuels containing sulfur are burned in the presence of oxygen.

a)

Carbon dioxide

b)

Sulfur dioxide

c)

Carbon monoxide

d)

Greenhouse gas

53.

Source of carbon monoxide

a)

Incomplete combustion of fossil fuels

b)

Combustion of fossil fuels

c)

Decomposition of plant and animal matters

d)

Photochemical reaction of CO2

54.
What is a primary pollutant? 
a)
pollutant that is put directly into air by human activities
b)
pollutants that react with other primary pollutants
55.

This primary pollutant creates a reddish brown gas creating photochemical smog and tropospheric ozone.

a)

sulfuric acid

b)

VOC

c)

nitrogen dioxide

d)

particulate matter

56.

Which of the following is an example of a primary pollutant?

a)

Acid rain

b)

Ozone

c)

Carbon monoxide

d)

Asbestos

57.

What is the major cause for air pollution?

a)

deforestation

b)

oil spills

c)

transportation

d)

cigarretes

58.
What is the name of the positive electrode?
a)
cathode
b)
anode
59.
What is the name of the negative electrode?
a)
cathode
b)
anode
60.

Kirchhoff's current law is applicable to only

a)

Junction in a network

b)

Closed loops in a network

c)

Electric circuits

d)

Electronic circuits

61.

Kirchhoff's current law states that

a)

Net current flow at the junction is positive

b)

Algebraic sum of the currents meeting at the junction is zero

c)

No current can leave the junction without some current entering it

d)

Total sum of currents meeting at the junction is zero

62.

Kirchhoff's voltage law is related to

a)

Junction cards

b)

Battery e.m.fs

c)

IR drops

d)

Both B and C

63.

According to Kirchhoff's voltage law, the algebraic some of all IR drops and e.m.fs. in any closed loop of a network is always

a)

Negative

b)

Positive

c)

Determined by battery e.m.fs.

d)

zero

64.

What is the basic law that has to be followed in order to analyze the circuit?

a)

Newton’s laws

b)

Faraday’s laws

c)

Ampere’s laws

d)

Kirchhoff’s law

65.

20. The figure below shows currents in a part of electric circuit. The current i is ________ .

a)

(a) 2 A

b)

(b) 1.3 A

c)

(c) 1.7 A

d)

(d) 1 A

66.

i2=

a)

1

b)

-1

c)

-1A

d)

1A

67.

i3 =

a)

3A

b)

-3A

c)

-3

d)

3

68.

i1=

a)

-7A

b)

7A

c)

5A

d)

-5A

69.

i2=

a)

13 A

b)

-13 A

c)

-1 A

d)

1 A

70.

i3=

a)

5A

b)

-5A

c)

9A

d)

-9A

71.

i1 and i2 =

a)

-14 A And 10 A

b)

10 A and -14 A

c)

14 A and -10 A

d)

-10 A and 14 A

72.

Find I1 and 12 flowing in the first and second loop.

a)

0.96 A, 1.73 A

b)

0.96 A, -1.73 A

c)

-0.96 A, 1.73 A

d)

-0.96 A, -1.73 A

73.

Mesh analysis is generally used to determine _________

a)

Voltage

b)

Power

c)

Resistance

d)

Current

74.

For the circuit shown, the resistances are R1 > R2 > R3. What is true about the current through each resistor?

a)

I1 = I2 = I3

b)

I1 > I2 > I3

c)

I1 > I3 > I2

d)

I1 < I3 < I2

75.

Certain node has three incoming currents I1, I2, and I3 and two outgoing currents I4 and I5. The correct KCL statement will be:

a)

I1 + I2 + I3 – I4 – I5 = 0

b)

I1 + I2 + I3 = I4 + I5

c)

I1 + I2 = I4 + I5 – I3

d)

All of these

76.

"The sum of all voltage drops in a series circuit equals the total applied voltage." This is know as what?

a)

Ohm's Law

b)

Kirchhoff's Voltage Law

c)

Kirchhoff's Current Law

d)

Bolen's Law

77.

"The total current in a parallel circuit equals the sum of the individual branch currents."

a)

Ohm's Law

b)

Kirchhoff's Voltage Law

c)

Kirchhoff's Current Law

d)

Bolen's Law

78.

An electrical junction has three wires A, B and C connected to it. Wire A carries 4.2 A going in, wire B carries 2.6 A going out. What does wire C carry?

a)

1.6 A going in

b)

1.6 A going out

c)

6.8 A going in

d)

6.8 A going out

79.

Consider the circuit shown in the figure below.


a) Apply Kirchhoff’s law to 𝑙𝑜𝑜𝑝 1 to find the current 𝑖1.

b) Apply Kirchhoff’s law to 𝑙𝑜𝑜𝑝 2 to find the current 𝑖2.

c) Find the current i3.

a)

a) i1 = -1/2A

b) i2 = -1/3A

c) i3 = -5/6 A

b)

a) i1 = -3/2A

b) i2 = -1/3A

c) i3 = -5/6 A

c)

a) i1 = -1/2A

b) i2 = -1/3A

c) i3 = -1/6 A

d)

a) i1 = -1/3A

b) i2 = -1/2A

c) i3 = -5/6 A

80.

What instrument is used to measure the electric current that flows through a wire?

a)

voltmeter

b)

galvanometer

c)

ammeter

d)

electric meter

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