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WorksheetsElectromagnets/Electricity
Total questions: 23
Worksheet time: 12mins
What type of energy does a battery store?
(a)
What is the compass aligned to initially? (when the wire is not connected to the battery)
Earth's magnetic field
The magnetic field of the battery
The magnetic field of the wire
What happens to the compass when the wire is connected to the battery?
Nothing happens to the compass
The compass is repelled from the wire and it goes flying
The compass starts to spin around endlessly
The compass changes direction due to the magnetic field from the wire
How can you make an electromagnet?
Wrapping a large coil of wire around a permanent bar magnet
Letting a wire stick to the side of a bar magnet
Wrapping a large coil wire around a ferromagnetic material and connecting to a battery
How does he turn the electromagnet off?
Touching the wire with his hands
By disconnecting it from the battery
By pulling the screw out of the coils of wire
He used "the force"
Arrows are close together on a force field when the force is
stronger
weaker
opposite
Earth has a magnetic field that is similar to a bar magnet's magnetic field.
true
false
What do opposite pole on a magnet do?
attract
nothing
repel
all of the above
What do similar poles on a magnet do?
nothing
attract
repel
none of the above
How many poles does a magnet have?
4
5
2
6
9
What unit is used to measure current?
Ohms
Omega
Volts
Amps
What unit is used to measure resistance?
Ohms
Omega
Volts
Amps
What is the current in a circuit with 6 ohms of resistance and a battery containing 24 Volts?
1/4 A
144 A
4 A
0.4 A
What is the voltage of a circuit with 4 ohms of resistance and 3 amps of current?
12 V
21 V
4/3 V
3/4 V
