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WorksheetsElectricity and Magnetism
Total questions: 51
Worksheet time: 38mins
Name
Class
Date
1.
____________ allows electricity to flow.
a)
A conductor
b)
An insulator
c)
A magnet
d)
switch
2.
____________ stops the flow of electricity.
a)
A conductor
b)
An insulator
c)
A magnet
d)
switch
3.
To complete a circuit the switch must be
a)
unattached
b)
open
c)
closed
4.
When the switch is closed, the light
a)
comes on
b)
stays off
c)
burns out
5.
What is one problem with using a series circuit?
a)
It has a lot of series.
b)
If one goes down, they all go down!
c)
It doesn't work properly.
d)
There are no problems.
6.
What is one benefits of using a parallel circuit?
a)
It gets confusing.
b)
There are no problems.
c)
If one goes down, it does not affect the others.
d)
It uses less wiring.
7.
A flow of electrons through a conductor is called:
a)
A river
b)
A spark
c)
An electron flow
d)
A current
8.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
9.
What kind of circuit is this?
a)
Series
b)
Consecutive
c)
Parallel
d)
Training
10.
What kind of circuit is this?
a)
series
b)
parallel
11.
A material in which electrons are able to move easily
a)
Circuit
b)
Insulator
c)
Resistance
d)
Conductor
12.
A material in which electrons are not able to move easily
a)
Circuit
b)
Insulator
c)
Resistance
d)
Conductor
13.
Which statement is true?
a)
The light bulb will light up because the circuit is complete.
b)
The light bulb will light up because the circuit is broken.
c)
The light bulb will not light up because the circuit is complete.
d)
The light bulb will not light up because the circuit is broken.
14.
In a parallel circuit if one of the light bulbs burns out the rest _________.
a)
stop the flow of electricity
b)
can still light up
c)
will go out
d)
of the light bulbs burn out also
15.
Will this circuit light the bulb?
a)
Yes
b)
No
16.
Will the light bulb light up if the switch remains open as shown?
a)
Yes, because the circuit will be complete.
b)
Yes, because the battery will push the electric current.
c)
No, because the electric circuit is not complete.
d)
No, because the battery will push the electric current.
17.
The circuit lights the light bulb. What is the purpose of the switch in the circuit?
a)
to push the electric current
b)
to open and close the circuit
c)
to insulate the circuit
d)
to make the electricity
18.
The circuit below lit the light bulb. What is the best claim we can make from this evidence?
a)
The metal key is an insulator.
b)
The metal key is a conductor.
c)
The wires are not conductors.
d)
The circuit is not complete.
19.
Sarah planned an investigation to test the strength of electromagnets. In one electromagnet she used two batteries and a small core. In the other electromagnet she used one battery and a thicker core. Was this a fair test?
a)
No, because she changed more than one variable.
b)
No, because the number of batteries does not matter.
c)
Yes, because the number of batteries does not matter.
d)
Yes, because she tested the correct number of variables.
20.
When a 9 volt battery is connected to a 3 ohm resistor, how much current flows in the circuit?
a)
3 amps
b)
6 amps
c)
9 ohms
d)
100 watts
21.
What will happen if an extra battery is added?
a)
The lights will glow dimmer
b)
The wire will glow
c)
The lights will glow brighter
d)
None of the above
22.
The tendency for a material to oppose the flow of electrons, changing electrical energy into thermal energy and light.
a)
Voltage
b)
Current
c)
Resistance
d)
Circuit
23.
According to this law, the current in a circuit equals the voltage difference divided by the resistance.
a)
Law of Conservation of Energy
b)
Ohm's Law
c)
Law of Conservation of Charges
d)
Newton's First Law
24.
Voltage is measured in __.
a)
volts.
b)
watts.
c)
coulombs.
25.
Resistance is measured in ___.
a)
watts.
b)
amps.
c)
ohms.
26.
What is current measured in?
a)
Inches
b)
Amperes
c)
Centimeters
d)
Newtons
27.
Electricity is the flow of _________.
a)
Protons
b)
Neutrons
c)
Electrons
28.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
29.
If the battery produced 12.6 Volts and what would be the current flow be for a 6 Ohm resistor
a)
2.1 Amps
b)
2.4 Amps
c)
1.71 Amps
d)
15 Amps
30.
How many Volts would we need to produce a current flow of 8 Amps through a 6 Ohm resistor
a)
12 volts
b)
24 volts
c)
1.3333
d)
48 volts
31.
As the resistance of a circuit increases, the current will
a)
increase
b)
decrease
c)
stay the same
32.
How are electromagnets different from magnets?
a)
magnets can be turned on/off
b)
you can turn an electromagnet on/off
c)
magnets are more powerful
d)
magnets have a North and South pole
33.
A device that converts electrical energy into mechanical energy
a)
A. electromagnet
b)
B. electromagnetic induction
c)
C. electric motor
d)
D. electric generator
34.
A device that converts mechanical energy into electrical energy
a)
A. electromagnet
b)
B. electromagnetic induction
c)
C. electric motor
d)
D. electric generator
35.
Sally is creating a model to show what happens when electricity is used. She decided to show the motor spinning below as her model. How could she best explain what is happening?
a)
Electric energy is transformed into energy of motion.
b)
Heat energy is transformed into energy of motion.
c)
Heat energy is transformed into electric energy.
d)
Electric energy is transformed into light energy.
36.
The process of creating a current in a circuit by changing a magnetic field
a)
A. electric generator
b)
B. electric motor
c)
C. electromagnetic induction
d)
D. magnet
37.
A coil of wire with an electric current in it is called a(n)
a)
A. transformer.
b)
B. electric generator.
c)
C. electric motor.
d)
D. solenoid.
38.
As electrons move, they make
a)
A. protons.
b)
B. auroras.
c)
C. ferromagnetism.
d)
D. magnetic fields.
39.
What is created when a wire moves between the poles of a magnet?
a)
A. a ferromagnet
b)
B. a solenoid
c)
C. an electromagnet
d)
D. an electric current
40.
A coil of wire that has a soft iron core and that acts as a magnet when an electric current is in the coil is called a(n)
a)
A. temporary
magnet.
b)
B. permanent
magnet.
c)
C. electromagnet
d)
D. ferromagnet.
41.
Increasing the electric current in the wire is one way to
a)
A. strengthen
a solenoid’s magnetic field.
b)
B. make
an electromagnet become a solenoid.
c)
C. make
a solenoid become an electromagnet.
d)
D. weaken
a solenoid’s magnetic field.
42.
Increasing the number of loops in the coils of a solenoid is one way to
a)
A. increase the wire’s electric current
b)
B. strengthen the solenoid’s magnetic field.
c)
C. decrease the wire’s electric current.
d)
D. weaken the solenoid’s magnetic field.
43.
Some electrical motors run on DC which is...
a)
Direct circumference
b)
Directional current
c)
Direct current
d)
Dancing cats
44.
Magnetism created by an electric current
a)
electricity
b)
electromagnetism
c)
wind energy
d)
current magnetism
45.
Some electrical motors run on AC which stands for...
a)
Amazing cats
b)
Alternating circumference
c)
Attitudinal current
d)
Alternating current
46.
A student created the model of an electromagnet shown below. How could she best explain why the paper clip stuck to the nail?
a)
The electric current in the circuit magnetized the nail.
b)
The paper clips were magnets.
c)
The electric current in the circuit melted the nail.
d)
The nail heated up causing it to become a magnet.
47.
How does the function of a generator relate to the function of a motor?
a)
They are the same
b)
They are opposites
c)
They both work the same way
d)
They are not related at all
48.
If two negative charges are held close together and then released, the charges will
a)
accelerate toward each other.
b)
accelerate away from each other.
c)
not move.
d)
move at a constant speed away from each other
49.
What would increase the strength of an electromagnet?
a)
Increasing the amount of current flowing through the wire.
b)
Inserting a wooden core inside the coil
c)
Changing the direction of the current
d)
Decreasing the number of coils of wire
50.
A student built four electromagnets with different cores. Everything else about the electromagnets was the same. Which of the following cores would make her electromagnet the strongest?
a)
iron
b)
nickel
c)
wood
d)
plastic
51.
As an electron moves, it makes, or induces a(n)
a)
acceleration.
b)
ferromagnet.
c)
chemical reaction.
d)
magnetic field.
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