Electricity Review

When distance increases, electrostatic force ____________; we call this relationship ____________ proportional

• decreases;directly
• decreases;inversely
• increases;inversely
• increases;directly

What happens to the force between two charged objects when you double the distance between them?

• 2X
• 1/2X
• 4X
• 1/4X

What happens to the force between two charged objects if you double the distance between them and double the magnitude of one charge?

• 4X
• 6X
• 1/2X
• 1/6X

When distance increases, electrostatic force ____________; we call this relationship ____________ proportional

• decreases;directly
• decreases;inversely
• increases;inversely
• increases;directly

As the resistance of a circuit increases, the current will

• increase

• decrease

• stay the same

• increase and then decrease

If the current through a circuit is 2 A and the resistance of a light bulb in the circuit is 10 Ohms, what is the voltage difference across the light bulb?

• 5 V
• 12 V
• 0.2 V
• 20 V

This is the circuit symbol for ...

• an AC current source
• a DC current source
• an ammeter
• a voltmeter

The difference in electrical potential energy between two places is called

• resistance
• friction
• induction
• voltage

A student uses a length of wire as a resistor. He makes a second resistor from the same material.

To be certain of making a second resistor of higher resistance, he should use a piece of wire that is:

• longer and thicker.

• longer and thinner.

• shorter and thicker.

• shorter and thinner.

The diagram shows a circuit with a 3.0Ω and a 2.0 Ω resistor connected in parallel.

The switch is open, and the ammeter reads 2.0 A.

The switch is now closed and the ammeter reads the total current in both resistors.

What is the ammeter reading with the switch closed?

• 1.2 A

• 3.0 A

• 4.0 A

• 5.0 A