## Quiz sheet for electrical power

Power used in an electrical circuit is measured in

A) volts

B) watts

C) amperes

D) ohms

Power in a d.c. circuit can be determined by the product of the readings from two separate instruments. These are the:

A) voltmeter and wattmeter

B) ammeter and wattmeter

C) voltmeter and ammeter

D) ohmmeter and wattmeter

If the voltage applied to a resistor is doubled the power will:

A) double

B) decrease by four times

C) halve

D) increase by four times

If the voltage applied to a resistor is halved the power will:

A) double

B) increase by four times

C) halve

D) decrease by four times

The rate at which energy is used is measured in

A) watts

B) joules

C) amperes

D) coulombs

Power may be defined as the rate at which

A) current changes

B) a quantity of electricity is dissipated

C) the resistance of a resistor changes

D) energy is expended

The term work is directly related to:

A) how quickly a body accelerates

B) how heavy a body is

C) the distance a force moves a body

D) the rate at which energy is used

If the electro-motive force applied to a circuit is doubled, the power consumption of that circuit will be:

A) doubled

B) halved

C) unchanged

If a 120 volt heater was connected to a 240 volt supply, its power consumption would be:

A) doubled

B) halved

C) unchanged