Magnetism and Its Uses

The region around a magnet where the magnetic forces act is the _____________.

• magnetic pole

• magnetic field

• magnetic domain

• electromagnet

Tags

NGSS.MS-PS2-5

A device that increases or decreases the voltage of an alternating current is a ___________.

• transformer

• motor

• commutator

• galvanometer

An instrument that measures electric current is a _________.

• transformer

• motor

• commutator

• galvanometer

A device that increases or decreases voltage in a power line is called a ________.

• transformer

• motor

• generator

• commutator

The location of the strongest magnetic forces on a magnet are the _________.

• magnetic fields

• magnetic domains

• magnetic poles

• electromagnets

In a step-up transformer, the number of turns of wire is greater in the _______ coil than in the ________ coil, and the __________ voltage exceeds the ______ voltage.

• secondary, primary, input, output

• secondary, primary, output, input

• primary, secondary, input, output

• primary, secondary, output, input

Tags

NGSS.HS-PS3-3

Current that does not reverse direction is called _______.

• direct current

• magnetic current

• alternating current

• circuit current

Objects that keep their magnetic properties for a long time are called ______.

• permanent magnets

• magnetic domains

• electromagnets

• temporary magnets

Current that reverses direction in a regular patter is called _______.

• direct current

• magnetic current

• alternating current

• circuit current

A reversing switch that rotates with the coil in an electric motor and reverses the direction of the current every half turn is a ________.

• transformer

• commutator

• motor

• galvanometer