Electricity Review

1. If you know the power rating of an appliance and the voltage of the line it is attached to, you can calculate the current the appliance uses by

• multiplying the voltage by the power

• dividing the voltage by the power

• dividing the power by the voltage

Most of the circuits in your home are

• Series

• Closed

• Parallel

Which of the following would reduce the resistance of a metal wire?

• Increase thickness

• Increase length

• Increase temperature

Resistance is affected by a material’s

• thickness

• temperature

• length

• all the above

Tags

NGSS.MS-PS3-4

What type of current is used in a battery?

• parallel

• direct

• alternating

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

• one

• two

• unlimited

The current in a clothes iron measures 5.0 amps. The resistance of the iron is 24 ohms. What is the voltage?

• 120V

• 19V

• 4.8V

Which of the following represents Ohm’s law?

• R = V x I

• V = I x R

• V = I / R

What is the difference in electrical potential energy between two places in an electric field?

• current

• induction

• potential difference

Tags

NGSS.MS-PS3-2

What is the unit of electric power?

• watt

• volt

• ohm