U6 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