Magnetism 2023

Magnetic field lines around a bar magnet

• are only perpendicular to the magnet

• spread out from one pole to another

• cross back and forth over each other

• are perfectly straight

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Every magnet, regardless of its shape, has two

• magnetic poles

• magnetic charges

• magnetic fields

• magnetic needles

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Magnetic poles that are unlike

• attract each other

• repel each other

• do not interact

• point in the same direction

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The type of current produced by a battery is

• direct current

• alternating current

• magnetic current

• induced current

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

An electric current produces

• magnetic field

• magnet

• solenoid

• insulator

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Electric current from a generating plant is

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

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

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

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

Magnetic poles that are alike

• attract each other

• repel each other

• do not interact

• have the same shape

A solenoid with a ferromagnetic core is called

• electromagnet

• magnetic pole

• lodestone

• temporary magnet

A device used to measure small currents

• electric motor

• commutator

• armature

• galvanometer