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WorksheetsElectricity and Magnetism Review
Total questions: 20
Worksheet time: 24mins
Name
Class
Date
1.
What method is involved when charged atoms in an uncharged metal object are rearranged without direct contact with a charged object?
a)
friction
b)
induction
c)
convection
d)
conduction
2.
If a material does not allow charges to move through it easily, what is it called?
a)
electrical insulator
b)
electrical conductor
c)
static electricity
d)
electric discharge
3.
Sara rubs a balloon on her hair and charges both the balloon and her hair. What will happen if Tara holds the balloon close to her hair?
a)
Her hair will be repelled by the balloon because her hair and the balloon have the same charge.
b)
Her hair will be attracted to the balloon because her hair and the balloon have the same charge.
c)
Her hair will be repelled by the balloon because her hair and the balloon are oppositely charged.
d)
Her hair will be attracted to the balloon because her hair and the balloon are oppositely charged.
4.
The size of an electric force depends on which two things?
a)
the amount of each charge and the size of the electric field
b)
The distance between the charges and the size of the electric field
c)
the number of protons and the distance between the charges
d)
the amount of each charge and the distance between the charges.
5.
What happens when electrons move from one object to another by direct contact?
a)
friction
b)
detection
c)
induction
d)
conduction
6.
If the leaves of an electroscope spread apart, it indicates that ___.
a)
the leaves are neutral.
b)
the leaves have received a charge.
c)
no charge is moving through the electroscope.
d)
there is static electricity in the electroscope.
7.
Electric charge that has accumulated or built up on an object is referred to as ___.
a)
circuit electricity.
b)
current electricity.
c)
current circuit.
d)
static electricity.
8.
The type of current produced by a battery is
a)
direct current.
b)
alternating current.
c)
magnetic current.
d)
induced current.
9.
A static discharge differs from an electric current in that a static discharge ___.
a)
involves the movement of ions as well as electrons
b)
is a flow of electrons
c)
lasts for only a fraction of a second
d)
results because a force is exerted on the electrons.
10.
What is the rate at which charges pass a given point?
a)
electrical energy
b)
ohms
c)
electric current
d)
voltage
11.
The statement that current is equal to the voltage difference divided by the resistance is known as ___.
a)
Einstein's equation
b)
Faraday's law
c)
Newton's Law of Thermodynamic relativity
d)
Ohm's Law
12.
A switch is inserted into a series circuit of Christmas lights. During the night, the switch is left open. The lights will
a)
continue to burn.
b)
be turned off.
c)
become a parallel circuit.
d)
burn brighter.
13.
A video monitor draws 1.75 A at voltage of 160 V. What is the power rating of the monitor?
a)
161.75 W
b)
91.43 W
c)
280 W
d)
225 W
14.
What is the voltage if the current is 0.7 A and the resistance is 4 Ώ?
a)
28 V
b)
2.8 V
c)
5.7 V
d)
57 V
15.
What is the resistance if the current is 4 A and the voltage is 10 V?
a)
40 Ώ
b)
0.4 Ώ
c)
25 Ώ
d)
2.5 Ώ
16.
If an electric water heater uses 30 kW of power and runs for 6 hours, what is the total amount of energy used?
a)
5 kilowatt-hours
b)
36 kilowatt-hours
c)
180 kilowatt-hours
d)
360 kilowatt-hours
17.
An electric current will always follow
a)
the path that leads through insulators.
b)
a path toward the south pole.
c)
a path towards the north pole.
d)
the path of least resistance.
18.
In a series circuit with three bulbs, adding another bulb will
a)
make the nearest bulb brighter.
b)
make some of the bulbs dimmer.
c)
make all of the bulbs dimmer.
d)
have no effect.
19.
In the example, R1 = r2; as the electrons flow through the circuit
a)
half the electrons flow through R1 and half flow through R2
b)
more electrons flow through R1 than R2
c)
more electrons flow through R2 than R1
d)
all electrons flow through R1 and R2
20.
What are the units for measuring the current present in an electrical circuit?
a)
ohms
b)
volts
c)
amps
d)
watts
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