Unit 4: Electricity and Magnetism Exam Review

As in the case of unlike magnetic poles, unlike electric charges

• attract

• exist in pairs

• repel

• do not interact

The buildup of charges on an object is called.

• static discharge

• postive charge

• static electricity

• negative charge

What causes charges to move in a circuit?

• voltage

• electricity

• energy

• magnetism

An electric current will always follow.

• the path of least resistance

• a path toward the south pole

• a path toward the north pole

• the path that leads through insulators

In a series circuit with three bulbs, adding another bulb will.

• make the nearest bulb brighter

• make all the bulbs brighter

• make some of the bulbs dimmer

• make all the bulbs dimmer

In a parallel circuit with three bulbs, _____

• the bulbs must all be located on the same branch

• there are multiple paths for the current to take

• there is only one path for the current to take

• the overall resistance increases if a new branch is added

The charge on a proton is

• negative, and the charge on an electron is positive

• the same as the charge on an electron

• positive, and the charge on an elextron is negative

• can change according to the situation

A complete, unbroken path through which electric charges can flow is a (an)

• electric circuit

• magentic field line

• electrical resistance

• magnetic pole

Materials that allow electric charges to move freely through them are called_____.

• insulators

• resistors

• conductors

• magnets

An example of an insulator is _______.

• rubber

• sliver

• copper

• iron