Bob Jones Physical Science Ch. 10 Test

Capacitors contain

• conductors and semiconductors
• insulators only
• conductors only
• conductors and insulators

Two objects will attract each other electrically only if

• both are negative
• both are neutral
• both are positive
• one is positive and one is negative.

Charging an object without actually adding or removing electrons is called

• electrical grounding
• electrical insulation
• electrical induction
• electrical conduction

Which of the following is a conductor

• plastic
• concrete
• wood
• gold

Which of the following could NOT happen when two charged objects touch each other?

• Several seconds pass, and then the objects fly apart
• The two objects stay together
• The two objects immediately spring apart from each other
• All of the above could occur

Lines of force represent electric fields through their

• thickness
• closeness
• direction
• both B and C

Conventional current

• is opposite the flow of positive charges in a conductor
• is opposite the flow of electrons in a conductor
• occurs only in solids, such as wires
• is the flow of positive charges through an insulator

A mechanical electroscope cannot detect

• a positive charge
• a negative charge
• a small charge
• a neutral charge

Which of the following is an insulator?

• rubber
• geranium
• silicon
• lead

What part of a circuit is designed to turn electricity into another form of energy?

• switch
• battery
• electrical load
• wires