Magnetism and Electromagnetism Review

All permanent magnets have two

• magnetic charges

• magnetic fields

• magnetic needles

• magnetic poles

Like poles on a permanent magnet will

• attract each other

• repel each other

• always interact

• point in the same direction

Tags

NGSS.MS-PS2-5

Which poles on the earth change?

• the North and South

• the magnetic poles

• the geographic poles

• the telephone poles

What is known as the difference between the earth's magnetic pole and its geographic pole?

• magnetic declination

• magnetic difference

• geographic decline

• geographic increase

As earth's magnetic poles move what happens to the magnetic declination of a given location

• it will always remain constant

• it will return to zero

• it will change

• it will always double

To reverse current direction in a motor the conducted current goes

• through the commutator to the armature

• through the armature

• through the brushes to the commutator

• in the direction of rotation

What type of device can increase and decrease voltage?

• Generators

• Transformers

• Galvanometers

• Electric motors

What do electric generators do

• transform mechanical energy to electrical energy

• transform mechanical energy to sound

• transform electrical energy to mechanical energy

• transform electrical energy to potential energy

What type of device converts mechanical energy into electrical energy?

• solenoid

• electric motor

• transformer

• generator

What type of device converts electrical energy into mechanical energy

• electric motors

• generator

• transformers

• galvanometer