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WorksheetsElectricity
Total questions: 15
Worksheet time: 8mins
Which statement is true?
I. All electromagnets are permanent magnets.
II. Increasing the number of coils in an electromagnet decreases it strength.
III. Increasing the batteries increases the strength of an electromagnet.
Both I and II
Which can increase the strength of an electromagnet?
increasing the number of coils around the nail
increasing the number of batteries
making the core bigger
all of the above
Which of the electromagnets would have the greatest magnetic field?
Which of the following is NOT part of an electromagnet?
wire
core
battery
needles
It is a kind of magnet that works only when there is a flow of electricity.
Electromagnet
Bar Magnet
Horse Shoe Magnet
Magnetite
Which appliance does NOT use electromagnet?
telephone
television
radio
broom
Which is NOT made of electromagnet?
cooking pan
transformer
generator
motor
Which of these forces can be used in a motor?
magnetism
wind
friction
gravity
Electromagnets are ___________________.
permanent
instant
temporary
stable
Which makes an electromagnet work?
needle
electricity
pin
thumbtacks
The components of an electromagnet are?
a power source
wire
iron core
all of these
Sophia made an electromagnet but it was very weak. How can she make it stronger?
take away the battery
wrap the wire loosely
use less copper wire
coiled more copper wire
What component becomes a temporary magnet when electricity is flowing through the circuit?
iron nail
copper wire
battery
switch
Which component provides the energy or the power source to run the electromagnet?
Iron nail
wire
Switch
Battery
Princess made an electromagnet with one battery and wrapped a copper wire 30 times while Megan made and electromagnet with one battery and wrapped a copper wire 50 times. Which electromagnet is stronger?
Megan
Princess
