ELECTROMAGNETIC

What will happen when a magnet is placed near a piece of iron?

• The piece of iron will go through a physical change.

• The piece of iron will go through a chemical change.

• The piece of iron will be attracted to the magnet.

• None of the above

Tags

NGSS.MS-PS2-5

An electric motor uses an electromagnet to change ________.

• magnetic fields in the motor

• electrical energy to mechanical energy

• mechanical energy to electrical energy

• magnetic poles in the motor

To strengthen an electromagnet, _______.

• put a non-magnetic substance in the coil

• all of the above

• increase the number of turns in a coil

• decrease the voltage

An electromagnet is a ______________ magnet.

• temporary

• series

• permanent

• parallel

What happens when you disconnect an electromagnet from a battery?

• Nothing will happen.

• It will explode.

• It will continue from attracting non-metals.

• It will stop from attracting metals.

Which of the following are components is NOT an electromagnet?

• dry cell

• nail

• wire

• plastic cap

Which statement is TRUE of an electromagnet?

• An iron core is not needed to make an electromagnet.

• An increase in the number of turns of wires or coils makes an electromagnet becomes stronger.

• An electromagnet is a permanent magnet.

• A small dry cell makes a strong electromagnet.

Which of the following is NOT a factor affecting the strength of an electromagnet?

• number and diameter of dry cells (battery)

• Number of turns or coils

• core materials

• plastic caps

Tags

NGSS.MS-PS2-3

What were the factors that affected the strength of the electromagnets?

• number of turns, number and size of dry cell, plastic caps

• number of coils, number and size of dry cell, core material

• number of turns, size of dry cell, core material

• number of coils, size of dry cell, plastic caps

Tags

NGSS.MS-PS2-3

Which electromagnet produced the strongest magnetic field? Why?

• large

• medium

• small

• All produced the same magnetic field

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5