Electromagnet

Electromagnet

By Rochell Cabahug

Multiple Choice

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

Multiple Choice

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

Multiple Choice

Which of the electromagnets would have the greatest magnetic field?

Multiple Choice

Which of the following is NOT part of an electromagnet?

• wire

• core

• battery

• needles

Multiple Choice

Which appliance does NOT use electromagnet?

• telephone

• television

• radio

• broom

Multiple Choice

Which is NOT made of electromagnet?

• cooking pan

• transformer

• generator

• motor

Multiple Choice

Which of these forces can be used in a motor?

• magnetism

• wind

• friction

• gravity

Multiple Choice

Electromagnets are ___________________.

• permanent

• instant

• temporary

• stable

​The difference between a permanent magnet and an electromagnet is as follows:

• Permanent magnets are permanently magnetized while electromagnets are temporarily magnetized.

• The former is made up of hard materials while the latter one is made up of soft materials.

Multiple Choice

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

Multiple Choice

What component becomes a temporary magnet when electricity is flowing through the circuit?

• iron nail

• copper wire

• battery

• switch

Multiple Choice

What component provides the pathway to carry electricity from component to component?

• battery

• wire

• switch

• iron nail

Multiple Choice

Which component provides the energy or the power source to run the electromagnet?

• Iron nail

• wire

• Switch

• Battery

Multiple Choice

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

Multiple Choice

What is an electromagnet?

• a permanent magnet with a north and south pole

• a temporary magnet made from current carrying wire around a magnetic metal core

Multiple Choice

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Remove all the coils and the nail.

• Use a smaller battery.

• Reverse the poles of the magnet.

• Add more coils of wire to the nail.

Multiple Choice

Which of the following is NOT part of an electromagnet?

• Toothpick

• battery

• Iron nail

• wire

Multiple Choice

Surrounding every magnet is a __________ __________.

• another magnet

• electrical current

• magnetic field

Multiple Choice

What are the components of the electromagnet?

• copper wire, iron nail, and a wooden stick

• copper wire, iron nail

• copper wire, iron nail, and a battery

• Copper wire, paper and a battery