Electricity and Magnetism

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

• attract each other

• repel each other

• exist in pairs

• do not interact

The buildup of charges on an object is called ____.

• static discharge

• static electricity

• positive charge

• negative charge

What causes charges to move in a circuit?

• voltage

• energy

• electricity

• magnetism

An electric current will always follow ____.

• the path of least resistance

• a path toward the north pole

• a path toward the south pole

• the path that leads through insulators

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

• make the nearest bulb brighter

• make some of the bulbs dimmer

• make all the bulbs brighter

• make all the bulbs dimmer

In a parallel circuit with three bulbs, ____.

• the bulbs must all be located on the same branch

• there is only one path for the current to take

• current from each bulb has its own path

• 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

• positive, and the charge on an electron is negative

• the same as the charge on an electron

• can change according to the situation

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

• electric circuit

• electrical resistance

• magnetic field line

• magnetic pole

Materials that allow the charges of an electric current to move freely through them are called ____.

• insulators

• conductors

• resistors

• magnets

An example of an insulator is ____.

• rubber

• copper

• silver

• iron