_____is an electric current that reverses direction in aregular pattern.

	AC
	FC
	DC
	BC

2.

Select the best answer. The process that occurs when an electric current is generated by a changingmagnetic field is called electromagnetic _____.

	deduction
	theory
	induction
	phenomenon

3.

Select the best answer.

A(n) _____is a thin, coiled wire that is tightly wrapped around ametallic core.

	electromagnet
	commutator
	solenoid
	galvanometer

4.

Select the best answer. Where is the magnetic force weaker?

	A
	B

5.

Select the best answer. If a material has its magnetic domains all pointing in the same direction at alltimes, it is a _____magnet.

	temporary
	permanent

6.

Select the best answer. Which type of current is used in homes, can travel long distances, and wasinvented by Nikola Tesla?

	AC
	DC
	electromagnetic

7.

Select the best answer. _____is an electric current that flows in a single direction.

	BC
	DC
	FC
	AC

8.

Select the best answer.

A(n) _____is a device that converts electrical energy intomechanical energy.

	electric motor
	fuse
	generator
	electromagnet

9.

Select the best answer. How can you increase electric current with electromagnetic induction?

	Increase the speed at which the magnet moves.
	Increase the number of coils.
	Increase the strength of the magnet.
	all of these

10.

Select the best answer. The use of electric currents to make a magnet is called _____.

	currentmagnetism
	inductive magnetism
	magnetelectrotism
	electromagnetism

11.

Select the best answer.

Which of these drawings ofmagnetic domains in a paperclip show a magnetizedpaper clip?

	B
	A

12.

Select the best answer.

A(n) _____is a conducting metal ring in a motor or generator thatis split.

	galvanometer
	solenoid
	commutator
	electromagnet

13.

Select the best answer. Which type of current is used in flashlights and batteries, and was invented byThomas Edison?

	DC
	AC
	electromagnetic

14.

Drag and drop to label the parts of this electric motor.

Choices

brushes

copper wire loop

current

commutator

15.

Select the best answer.

A(n) _____is a device that uses electromagnets to measureelectric currents.

	galvanometer
	anemometer
	solenoid
	ohmmeter

16.

Select the best answer. A device that transforms mechanical energy into electrical energy with the help ofelectromagnetic induction is a(n) _____.

	solenoid
	radar
	motor
	generator

17.

Select the best answer. Why are electromagnets temporary?

	They are only magnetic if an electric current is running through them.
	They are only magnetic if placed near a magnet.
	They are not temporary; they are permanent.
	They are only magnetic when placed in an electrolyte.