Chapter 7 Review Magnetism

When two magnets are brought close to each other, their magnetic fields __.

• they combine

• get larger

• attract or repel

• do all of these

Tags

NGSS.3-PS2-3

What is the region of space around a magnet where the magnetic forces exert a force called?

• electromagnetic pole

• magnetic domain

• magnetic field

• magnetic pole

Tags

NGSS.MS-PS2-5

How does varying the current affect the magnetic field in an electromagnet?

• The magnetic field is only affected by the number of coils, not the current.
• Higher current decreases the magnetic field strength.
• Changes both its strength and direction.

• Varying the current has no effect on the magnetic field.

Tags

NGSS.HS-PS2-5

A ​ (a)   is used to measure electric currents?

• galvometer
• solenoid
• electromagnet
• motor

What is an apparatus that converts electric energy to kinetic energy?

• Electric Motor

• Electromagnet

• Transformer
• Solenoid

Tags

NGSS.MS-PS3-5

What type of current does a dry-cell battery produce?

• alternating current (AC)

• both direct and alternating current

• the same current that a generator produces

• direct current (DC)

The magnetic domains of a permanent magnet are __.

• randomly aligned

• aligned in the same direction
• without direction

• going to move up and down

The __ pole of a compass points to the geographic north pole.

• west
• south
• east
• north

A compass needle is a small __.

• static object

• piece of plastic

• bar magnet

• electromagnet

How can the strength of the magnetic field of an electromagnet be increased?

• Decrease the number of wire turns
• Change the direction of the current

• Increase the amount of current

• Increase the distance from the power source