Electricity

In a filament lamp, in what form is most of the energy lost?

• Heat

• Sound

• Kinetic energy

• Radio waves

What is power?

• The number of repetitions of squats a body-builder can perform

• The number of cylinders in a car

• The rate at which energy is absorbed

• The rate at which energy is transferred

What is the formula for power?

• P = E⁄t

• P = t⁄E

• P = E⁄2t

• P = 2E⁄t

Calculate the power of an appliance that uses 1000 joules of energy in 5 seconds.

• 100 W

• 200 W

• 300 W

• 400 W

Power, potential difference and current are correctly related by which equation?

• P = I x V

• P = 2I x V

• P = I⁄V

• P = I⁄2V

What is the voltage of an appliance if it uses 200 J per second when supplied with a current of 5 A?

• 10 V

• 20 V

• 30 V

• 40 V

This is the symbol for a...

• Motor

• Ammeter

• Bulb

• Voltmeter

This is the symbol for a...

• Light Dependent Resistor

• Light Emitting Diode

• Thermistor

• Cell

Tags

NGSS.HS-PS3-5

This is the symbol for a...

• Light Emitting Diode

• Fuse

• Fixed Resistor

• Variable Resistor

This is the symbol for a...

• Bulb

• Voltmeter

• Ammeter

• Motor