Ch 20 Electricity

If an atom gains electrons, it becomes a

• positively charged ion
• negatively charged ion
• neutral atom
• neutral ion

If the two charges represented in the figure were brought near each other, they would

• attract each other
• repel each other
• cause static discharge
• have no effect on each other

Walking across a carpet is an example of charge being transferred by

• contact
• induction
• static electricity
• friction

If a neutral metal comb is held near an object with a negative charge, the comb will become chaged by

• induction
• contant
• friction
• static discharge

What type of current is produced by a battery?

• parallel current
• alternating current
• direct current
• potential current

The type of current in your school is mostly

• direct current
• alternating current
• series current
• produced by batteries

Resistance is affected by a material's

• thickness
• length
• temperature
• all of the above

The current in a hair dryer measures 15.0 amps. The resistance of the hair dryer is 8 ohms. What is the voltage?

• 120 V
• 0.5 V
• 7 V
• 1800 V

How many paths through which charge can flow would be shown in a circuit diagram of a series circuit?

• one
• two or more
• none
• more information is needed

Most of the circuits in your home are

• series circuits
• parallel circuits
• reversible circuits 
• closed circuits