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WorksheetsQ4 Practice Test
Total questions: 108
Worksheet time: 4hrs 36mins
Name
Class
Date
1.
Which of the following is not an element of a reflection?
a)
Reflected Ray
b)
Incident point
c)
Image
d)
Incident waves
2.
For a convex mirror, a light ray that comes to the mirror directed to the focal point will be reflected parallel to:
a)
Line of reflection
b)
Mirror
c)
Principal Axis
d)
Object
3.
Which of these would result in a more negative atom?
a)
Losing electrons
b)
Losing protons
c)
Adding electrons
d)
Two of the above
4.
What does dividing force by test charge yield? (?=F/q)
a)
Energy (E)
b)
Electric field intensity (E)
c)
Electric force (F)
d)
Electric potential (E)
5.
“Coulumbs/seconds” is an alternate unit to which these?
a)
Voltage (V)
b)
Energy (E)
c)
Charge (q)
d)
Current (I)
6.
What is the Law of Reflection (when a light ray strikes a reflecting surface,)
a)
The angle of incidence is larger than the angle of reflection
b)
The angle of incidence is smaller than the angle of reflection
c)
The angle of incidence is equal to the angle of reflection
d)
The angle of incidence does not produce a reflected ray
7.
In a concave mirror, all the reflected rays will pass though a common point, called the
a)
focal length
b)
focal point
c)
center of curvature
d)
convex point
8.
Atoms that have lost electron and become positively charged are called:
a)
positive ions
b)
negative ions
c)
protons
d)
electrons
9.
How much power is delivered to a light bulb on a 120V and 0.5A circuit?
a)
60W
b)
60N
c)
240W
d)
240N
10.
Find the image distance of an object placed at 5.00cm in front of a CONVEX mirror whose focal length is 8.00cm
a)
40cm
b)
1.6cm
c)
-13.33cm
d)
-1.6cm
11.
In a electric circuit, there is a battery connected in a wire that carries 36V, in this wire, there is 3 resistors. Two of them are in parallel and have a resistance of 4 ohms, and the other one is in series with the circuit and have a resistance of 10 ohms. What is the equivalent current that passes through the entire circuit?
a)
2 A
b)
3 A
c)
4 A
d)
5 A
12.
Total internal reflection of a cup of water will occur at the water-air interface if a beam of light enters the air from the water with an incident angle of ____. (The refractive indices of water is 1.3)
a)
42
b)
58
c)
54
d)
69
13.
A light bulb with resistance of 15Ω is connected to a 9 V battery. What is the electric current going through it?<br />
a)
0.4A
b)
0.5A
c)
0.6A
d)
0.7A
14.
A proton is at the origin. One electron is at the point (2m, 0m) and the other is at the point (-2m, 0m). What is the net force on the proton? F = ____
a)
0 N
b)
10 N
c)
100 N
d)
1000 N
15.
In a plane mirror, a object that has a height of 3m produces a image at the same distance with but with which height?
a)
1M
b)
2M
c)
2,5M
d)
3M
16.
In a plane mirror, a object that has a height of 3m produces a image at the same distance with but with which height?
a)
1M
b)
2M
c)
2,5M
d)
3M
17.
In a plane mirror, a object that has a height of 3m produces a image at the same distance with but with which height?
a)
1M
b)
2M
c)
2,5M
d)
3M
18.
In a plane mirror, a object that has a height of 3m produces a image at the same distance with but with which height?
a)
1M
b)
2M
c)
2,5M
d)
3M
19.
Two charges are separated by a distance of 2 nanometers from each other, assume that q1 has a charge of +3x10^-9 C and that q2 has a charge of +5x10ˆ-9 C. What is the value of the electric force that interact between those two charges? Coulomb’s Law - F=K(q1xq2)/dˆ2 And that K=9x10ˆ9 n.mˆ2/Cˆ2
a)
30.5x10ˆ-3
b)
35.0x10ˆ-3
c)
33.75x10ˆ-5
d)
33.75x10ˆ-3
20.
When trying to simplify and find the equivalent resistance you should first simplify resistors in ____ before simplifying those in ______<br />.
a)
parallel ;series
b)
combined; series
c)
circuit; parallel
d)
circuit; combined series
21.
If the resistance stays the same and the potential increases, what happens to the current?
a)
It decreases
b)
It increases
c)
It remains the same
d)
It is 0
22.
A ________ is designed to be connected to a circuit in parallel
a)
voltmeter
b)
ammeter
c)
resistor
d)
battery
23.
What is the force between two small charged spheres having charges of 3x10^-17 C and 4x10^-7 C placed 20 cm apart?
a)
17x10^-23 N
b)
6x10^-25 N
c)
27x10^-3 N
d)
5.4x10^-5 N
24.
Convex mirrors provide a _____ angle
a)
narrow
b)
thick
c)
thin
d)
wide
25.
Moving a point charge of 3.2x10^-19 C between points A and B in an electric fields requires 4.8x10^-19 J of energy. What is the potential difference between these points?
a)
1.5V
b)
2.0V
c)
3.0V
d)
0.5V
26.
An object is 2.0 m in front of a plane mirror. How is the image reflected?
a)
the image is real, behind the mirror, and 2.0 meters behind the mirror.
b)
the image is virtual, erect, and 2.0m behind the mirror.
c)
the image is real, inverted, and in front of the mirror
d)
the image is virtual, 2.0m inverted, and 4.0m in front of the mirror.
27.
you have an electric field with an intensity of 18 N/C at distance of 6.0 m. What is the voltage?
a)
18 V
b)
3 V
c)
108 V
d)
65 V
28.
solar cells converts chemical energy to ______________ energy.
a)
potential
b)
electrical
c)
mechanical
d)
solar
29.
a ______________is designed to be connected to a circuit in parallel.
a)
current
b)
ampere
c)
resistor
d)
voltmeter
30.
Use this equation P=IV How much power is dissipated by a 1.6A bulb on a 9V circuit?
a)
18 W
b)
6 W
c)
14.4 W
d)
9 W
31.
What is the formula for voltage?
a)
V=IR
b)
V=I/R
c)
V=I^2/R
d)
V=I/R^2
32.
Electric power is the___per unit time that is being converted into another form.
a)
work
b)
energy
c)
concentration
d)
none of the above
33.
Electrons flow through the electrolyte from the ___________ electrode.
a)
positive to negative
b)
negative to positive
c)
negative to negative
d)
positive to positive
34.
How much power is dissipated by a 1.6A bulb on a 9V circuit?
a)
0.17
b)
5.625
c)
14.4
d)
0.2844
35.
As a wire conductor increases in diameter, the resistance ____
a)
increases
b)
decreases
c)
stays the same
d)
who's to say?
36.
There are three 20.0 Ω resistors connected in series across a 120 V generator. What is the total resistance of the circuit?
a)
60 Ω
b)
40Ω
c)
30Ω
d)
100Ω
37.
A light bulb with resistance of 80 Ω is connected to a 9 V battery. What is the electric current going through it?
a)
0.1115A
b)
0.1125 A
c)
0.1239A
d)
None of the answers
38.
Use this equation I=P/V A large LCD TV uses 170W of power on a 120V circuit, how much current does it draw?
a)
1.42A
b)
1.50A
c)
1.20A
d)
1.39A
39.
An object is 55.0 cm to the left of a convex lens and the focal length is 9.00 cm. What is the image distance?
a)
27
b)
18
c)
13
d)
11
40.
What is a lab instrument used to analyze and test for static charge?
a)
Voltmeter
b)
Ammeter
c)
Electroscope
d)
Protoscope
41.
What happens to the potential energy when you bring attractive charges closer?
a)
It decreases the potential energy
b)
It increases the potential energy
c)
It neutralizes the potential energy
d)
It does nothing to the potential energy
42.
If the reflecting surface is smooth, what will the resulting reflection be?
a)
It will be a diffuse reflection
b)
It will be a regular reflection
c)
It will be a virtual reflection
d)
It will be a real reflection
43.
When a wave front enters a new medium at an angle, what will happen to the light?
a)
It will change directions
b)
It will not change directions
c)
It will curve
d)
It will decrease in speed
44.
If the resistance stays the same and the potential increases, what happens to the current?
a)
Current does not change
b)
Decreases
c)
Increases
d)
Stays the same
45.
What electrical resistor is commonly used to provide light?
a)
Tungsten
b)
Argon
c)
Light bulb
d)
Carbon
46.
What current flows through a 100 W light bulb connected to a 120 V outlet?
a)
0.833
b)
1.2
c)
120
d)
100
47.
What tool is commonly used to measure voltage?
a)
Resistor
b)
Voltmeter
c)
Switch
d)
Ammeter
48.
Electric power is the __________ per unit time that is being converted into another form.
a)
Energy
b)
Work
c)
Concentration
d)
Amps
49.
Which of the following topics is not part of the study of optics
a)
reflection
b)
refraction
c)
diffraction
d)
sonar
50.
What is the purpose of a circuit breaker
a)
a switch to cut off the electricity going through a circuit to not overwhelm it
b)
A switch to have more electricity to go through the circuit to supercharge it
c)
a switch to dismantle the circuit completely easily and efficiently
d)
it's a switch that's it that's all it is nothing more nothing less it does nothing.
51.
A light bulb with resistance of 60 ohms is connected to a 3 V battery. What is the electric current going through it?
a)
5 A
b)
.05 A
c)
.005 A
d)
.5 A
52.
What does an ammeter measure
a)
the voltage drop across a resistor
b)
the troughs and crests of a wave
c)
the current of a circuit
d)
the amount of birthdays on a certain day.
53.
What is the equation for Coulomb's law
a)
Fe=Kq1q2/d2
b)
Fe=Kq1q2
c)
Fe=Kq1/d2
d)
e-=mc squared
54.
What is the most common concave mirror?
a)
square mirrors
b)
Spehrical mirrors
c)
bathroom mirrors
d)
Vanity mirrors
55.
Which instrument is used to test for static charge?
a)
Barometer
b)
Electroscope
c)
Anemometer
d)
Hygrometer
56.
If the angle of incidence for an object and a plane mirror is 34 degrees, what is the angle of reflection?
a)
34 degrees
b)
146 degrees
c)
46 degrees
d)
90 degrees
57.
Voltage =
a)
E/d
b)
R*d
c)
E*R
d)
E*d
58.
A 120V battery maintains a current through a 40 ohm resistor. What is the current through the resistor?
a)
30 amps
b)
40 amps
c)
3 amps
d)
60 amps
59.
A battery causes a current of 3.0 A to flow through a light bulb. The power used by the light bulb is 18 Watts. What is the voltage?
a)
3 V
b)
6 V
c)
36 V
d)
0.16 V
60.
If a circuit has a resistance of 15 and a current of 15 A, what is the voltage?
a)
100
b)
225
c)
200
d)
250
61.
When two nearby charges are positive what do they do?
a)
repel
b)
attract
c)
nothing
d)
attach
62.
What does an ammeter measure while traveling through a circuit
a)
current
b)
voltage
c)
electricity
d)
resistance
63.
what allows electrons to travel through material freely?
a)
wire
b)
resistor
c)
conductor
d)
insulator
64.
What is the unit for capacitance
a)
Farad
b)
Coulomb
c)
Volt
d)
Ampere
65.
what is resistance
a)
work needed to stop something
b)
is the property that determines the amount of current flow though a particular material
c)
refusal to accept something
d)
ability not to be affected by something
66.
What does the Law of Reflection state?
a)
When a light ray strikes a reflecting surface, the angle of incidence (measured from the normal line) is equal to the angle of reflection (also measured from the normal line)
b)
The images that appear in a plane (flat) mirror are reversed in some ways and not reversed in other ways.
c)
If the reflecting surface is rough, the reflection will be diffuse and objects will be distorted in the reflection.
d)
If the reflecting surface is a very smooth surface, the reflection will be a regular reflection, in which the light rays maintain their position relative to each other and objects will be visible and identifiable in the reflected image.
67.
What happens when opposite charges get close to each other?<br />
a)
They repel each other.
b)
They attract each other.
c)
They repel surrounding objects.
d)
They attract surrounding objects.
68.
What do solar cells convert to electrical energy?
a)
Temperature
b)
Electric Current
c)
Voltage
d)
Energy from the sun
69.
The formula for electric power is:
a)
P = I^2R
b)
E = Pt
c)
P = R/I
d)
E = I/P^2
70.
As a wire conductor increases in diameter, the resistance
a)
stays the same.
b)
increases.
c)
decreases.
d)
changes size.
71.
A 6.00 V battery delivers a 0.400 A current to an electric motor that is connected across the battery terminals. What power is consumed by the motor?
a)
2.4 watts
b)
15 watts
c)
0.67 watts
d)
2.0 watts
72.
A voltmeter measures the potential difference between two large parallel plates to be 50.0 volts. The plates are 3.0 cm apart. What is the magnitude of the electric field strength between the plates?
a)
1500 N/C
b)
1200 N/C
c)
1700 N/C
d)
1000 N/C
73.
What electrical charge does an electron have?
a)
A positive charge.
b)
A negative charge.
c)
A neutral charge.
d)
No charge.
74.
For concave mirrors, when the object is outside C:
a)
the image that will appear is an image of Mr.Lund.
b)
the image will be behind the mirror and will be enlarged and upright.
c)
the image will be beyond C and will be enlarged and inverted.
d)
the image will be between C and F and the image will be inverted and diminished (smaller than the object).
75.
A 50 cm tall object is 3.0 m from a plane mirror. How far from the mirror will the image be?
a)
2.0 m
b)
3.0 m
c)
150.0 m
d)
16.67 m
76.
When a light ray strikes a reflecting surface, the angle of incidence is equal to the angle of reflection is called...
a)
The Law of Reflection
b)
Snell's Law
c)
Diffuse Reflection
d)
Regular Reflection
77.
In a plane mirror, the image will be _______ size as the object, and will be _______ distance behind the mirror as the object is in front of the mirror.
a)
A different, Closer in
b)
The same, The same
c)
A different, The same
d)
The same, Closer in
78.
In Coulomb's law, K equals what?
a)
1.00 x 10^10
b)
6.25 x 10^25
c)
9.0 x 10^9
d)
6.25 x 10^-25
79.
Two parallel metal plates are 20 cm apart. The magnitude of the electric field between them is 620 N/C. What is the potential difference between the plates? (Hint: Use V = Ed)
a)
31 V
b)
12, 400 V
c)
124 V
d)
None of the Above
80.
Surge means...
a)
When the voltage from an outlet rises above the accepted level.
b)
When the voltage from an outlet stays the same.
c)
When the voltage from an outlet drops.
d)
When the outlet is not working.
81.
When trying to simplify and find the equivalent resistance you should first simplify resistors in ____ before simplifying those in ______<br />.
a)
parallel ;series
b)
combined; series
c)
circuit; parallel
d)
circuit; combined series
82.
If the resistance stays the same and the potential increases, what happens to the current?
a)
increase
b)
decrease
c)
stay the same
d)
the current becomes non existent
83.
The unit of resistance is...
a)
joules
b)
watts
c)
ohms
d)
volts
84.
What happens when you move together two objects with the same charge closer together?
a)
The potential energy increases.
b)
The potential energy stays the same.
c)
The potential energy decreases.
d)
It is not possible to move them closer.
85.
What happens when two conducting spheres are touched together?
a)
Electrons flow evenly.
b)
Electrons flow from the sphere with excess electrons to the one with less.
c)
Nothing happens.
d)
Electrons flow from the sphere with less electrons to the one with excess.
86.
What is resistance measured in?
a)
Ohms
b)
Joules/second
c)
Coulombs
d)
Amperes
87.
what is grounding
a)
touching a charged object to the earth
b)
A typical capacitor consists of a pair of parallel plates
c)
the charge in coulombs
d)
The SI unit for capacitance, according to the equation above, will be coulombs/volt
88.
What is the equation for power through a circuit?
a)
P=V/I^2
b)
P=IR
c)
P=I^2
d)
P=I^2R
89.
what is the SI unit for Capacitance
a)
farad
b)
joules
c)
capacitance
d)
seconds per hour
90.
What is the purpose of an electric motor?
a)
Convert thermal to kinetic energy.
b)
Convert electrical into thermal energy.
c)
Contain thermal energy.
d)
Convert electrical to kinetic energy.
91.
what is Ohms
a)
v=IR
b)
P=I^2R
c)
E=I^2Rt
d)
P=VI
92.
What electrical charge does a electron have?
a)
negative
b)
positive
c)
neutral
d)
none of the above
93.
Whats the equation to calculate electrical energy?
a)
E=Pt
b)
P=VI
c)
Vt=V1+V2+V3
d)
E^2Rt
94.
What is the focal point?
a)
The point where all the reflected light rays pass through
b)
the source of light
c)
the center of the circle
d)
the highest point of the image
95.
What is the definition of a diffuse reflection?
a)
a reflection in which the object is not visible or identifiable
b)
a reflection where you can see the object perfectly
c)
a reflection which flips the object upside down
d)
a reflection which changes the objects color
96.
what color has the longest wavelength?
a)
red
b)
blue
c)
green
d)
orrange
97.
what color has the shortest wavelength?
a)
purple
b)
red
c)
green
d)
blue
98.
Which wave has the shortest wavelength?
a)
gamma
b)
x-ray
c)
Ultraviolet
d)
Visible light
99.
electrical force between two charges is directly related to the size of the charges and inversely proportional to the distance between the charges.
a)
Coulomb's law
b)
electric force
c)
point charge
d)
energy
100.
What happens when like charges are placed near each other?
a)
they attract
b)
they repel
c)
they stay the same
d)
they switch charges
101.
How is Coulomb's force between two charges affected, when each charge is tripled and the distance between them is also tripled?
a)
force increases by 3
b)
Force is lost
c)
Force remains same
d)
force is lost forever
102.
The work done moving a charge against the field can be found by which of the following equations
a)
y=mx+b
b)
W=Vq
c)
V=Ed
d)
E=V/d
103.
3.7Ω and a 11.2Ω resistor are connected in parallel across a 12V battery. What is the current passing through the 3.7Ω resistor?
a)
3.24A
b)
3.1A
c)
4A
d)
4.5A
104.
A voltmeter measures the potential difference between two large parallel plates to be 30 volts. The plates are 2.5 cm apart. What is the magnitude of the electric field strength between the plates?<br />
a)
7.5 N/C
b)
1,200 N/C
c)
75 N/C
d)
1.20 N/C
105.
What is the power delivered to a light bulb when the circuit has a voltage drop of 96 V and produces a current of 5.0 ampere?
a)
91 watts
b)
1.92 watts
c)
19.2 watts
d)
480 watts
106.
Solar cells convert the energy in sunlight to : ______________
a)
Thermal energy
b)
Electromagnetic energy
c)
Electric energy
d)
Mechanical energy
107.
What is the power dissipation of a 1.5 A lamp operating on a 12 V battery?
a)
30 W
b)
18 W
c)
13 W
d)
50 W
108.
Which of the following is an insulator?
a)
Steel
b)
Diamonds
c)
Salt water
d)
Copper
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