Unit 8 11 Practice Test

Magnetic field lines around a bar magnet

• are only perpendicular to the magnet.

• spread out from one pole and curve around to the other.

• cross back and forth over one another.

• are perfectly straight.

Tags

magnetic fields

Magnets

A4B7675571504DB7BE52CE75667773B2

S21245005

8.PS.1

Every magnet, regardless of its shape, has two

• magnetic poles.

• magnetic charges.

• magnetic fields.

• magnetic needles.

Tags

Magnets

A4B7675571504DB7BE52CE75667773B2

S21245005

8.PS.1

Magnetic poles that are unlike

• attract each other.

• repel each other.

• do not interact.

• point in the same direction.

Tags

Magnets

S21245005

8.PS.1

The buildup of charges on an object is called

• static discharge.

• static electricity.

• positive charge.

• negative charge.

Tags

Electricity

Charge

Static Electricity

S21245005

8.PS.1

The type of current produced by a battery is

• direct current.

• alternating current.

• magnetic current.

• induced current.

Tags

Electricity

Current

Electromagnetism

8.PS.1

S21245005

You can increase the strength of an electromagnet’s field by

• decreasing the current in the solenoid.

• decreasing the number of loops in the solenoid.

• using a stronger ferromagnetic material for the core.

• winding the coils more loosely

Tags

Electromagnetism

8.PS.1

S21245005

As Earth’s magnetic poles move, the magnetic declination in a given location will

• stay the same.

• switch to point south.

• change.

• return to zero.

Tags

Magnets

Magnetic Fields

An electric current produces a(n)

• magnetic field.

• magnet

• solenoid.

• insulator.

Tags

Electricity

Magnets

Magnetic Fields

Electromagnetism

Electric current from a generating plant is

• direct current transmitted at high voltages, but usually used at low voltages.

• alternating current transmitted at high voltages, but usually used at low voltages.

• alternating current transmitted at low voltages, but usually used at high voltages.

• direct current transmitted at low voltages, but usually used at high voltages.

Tags

Electricity

compass works because its magnetic needle

• Points east

• Points West

• Spins freely

• Repels Magnets