Welcome to the **Unit Of Electric Power MDCAT** MCQs with Answers. In this post, we have shared **Unit Of Electric Power** Multiple Choice Questions and Answers for **PMC MDCAT 2024**. Each question in MDCAT Physics offers a chance to enhance your knowledge regarding **Unit Of Electric Power** MCQs in this MDCAT Online Test.

## Unit Of Electric Power MDCAT MCQs Test Preparations

The SI unit of electric power is:

a) Watt

b) Volt

c) Ampere

d) Ohm

1 kilowatt is equal to:

a) 100 watts

b) 1,000 watts

c) 10 watts

d) 100,000 watts

Power can be calculated using which formula?

a) Power = Voltage × Current

b) Power = Voltage ÷ Current

c) Power = Current ÷ Voltage

d) Power = Voltage + Current

1 megawatt is equivalent to:

a) 1,000 watts

b) 10,000 watts

c) 100,000 watts

d) 1,000,000 watts

Which unit is used to measure electrical energy consumed over time?

a) Watt-hour

b) Ampere-hour

c) Volt-hour

d) Ohm-hour

The power factor of an electrical system is:

a) The ratio of voltage to current

b) The ratio of real power to apparent power

c) The product of voltage and current

d) The square of current

Which of the following is a unit of power?

a) Joule

b) Tesla

c) Watt

d) Coulomb

1 horsepower is equal to approximately:

a) 500 watts

b) 750 watts

c) 1,000 watts

d) 1,200 watts

The term “apparent power” is measured in:

a) Watts

b) Volt-amperes

c) Joules

d) Ohms

If a device consumes 100 watts of power for 1 hour, the energy consumed is:

a) 100 watt-hours

b) 1 watt-hour

c) 10 watt-hours

d) 100 joules

Which unit measures electrical power in an AC circuit?

a) Ohm

b) Volt

c) Watt

d) Ampere

The unit used to express the power of an electrical appliance is:

a) Joule

b) Watt

c) Volt

d) Ampere

Power in an electrical circuit is given by which product?

a) Current and Resistance

b) Voltage and Resistance

c) Voltage and Current

d) Voltage and Power Factor

1 megawatt-hour is equivalent to:

a) 1,000 watt-hours

b) 10,000 watt-hours

c) 100,000 watt-hours

d) 1,000,000 watt-hours

The term “reactive power” is measured in:

a) Watts

b) Volt-amperes reactive (VAR)

c) Joules

d) Ohms

Electrical power is the rate at which:

a) Voltage changes

b) Energy is used

c) Current flows

d) Resistance varies

Which of the following is not a unit of power?

a) Watt

b) Kilowatt

c) Ampere

d) Horsepower

The power consumed by an appliance can be calculated if you know its:

a) Voltage and Resistance

b) Current and Resistance

c) Voltage and Current

d) Voltage and Frequency

What does a watt measure in electrical terms?

a) Energy per unit time

b) Voltage per unit current

c) Electrical resistance

d) Current per unit voltage

1,000 watts is also known as:

a) 1 kilowatt

b) 1 megawatt

c) 1 milliwatt

d) 1 gigawatt

Which term describes the real power consumed in an AC circuit?

a) Apparent Power

b) Reactive Power

c) True Power

d) Active Power

The power consumed by a device that runs for 2 hours at 500 watts is:

a) 1,000 watt-hours

b) 500 watt-hours

c) 2,000 watt-hours

d) 1,500 watt-hours

1 kilowatt-hour is the energy consumed when:

a) 1 kilowatt power is used for 1 hour

b) 1 watt power is used for 1 hour

c) 1 kilowatt power is used for 1 minute

d) 100 watts power is used for 10 hours

The power rating of a device tells you:

a) Its electrical efficiency

b) How much current it uses

c) The amount of energy it consumes per unit time

d) The voltage across it

If a device uses 2,000 watts for 3 hours, the total energy consumed is:

a) 2,000 watt-hours

b) 6,000 watt-hours

c) 1,000 watt-hours

d) 600 watt-hours

Power in an AC circuit with a power factor of 1 is:

a) True Power

b) Reactive Power

c) Apparent Power

d) Zero Power

The unit “VA” stands for:

a) Volt-amperes

b) Volt-amps

c) Voltage-amperes

d) Variable-amperes

What does the term “power factor” refer to in electrical systems?

a) Efficiency of the device

b) Ratio of reactive power to real power

c) Ratio of real power to apparent power

d) Electrical load’s resistance

Electrical power is measured in terms of:

a) Energy per unit of time

b) Voltage per unit of current

c) Current per unit of voltage

d) Resistance per unit of time

If an appliance runs on 220 volts and 5 amperes, its power consumption is:

a) 220 watts

b) 1,100 watts

c) 2200 watts

d) 110 watts

In a purely resistive circuit, the power factor is:

a) Zero

b) One

c) Half

d) Variable

The term “kilowatt” is commonly used to express:

a) Electrical resistance

b) Electrical current

c) Electrical power

d) Electrical voltage

The total power in an AC circuit with a power factor of 0.8 is known as:

a) True Power

b) Reactive Power

c) Apparent Power

d) Complex Power

What is the formula for calculating electrical power in a resistive circuit?

a) P = V² / R

b) P = I² × R

c) Both a and b

d) P = V × I

Power measured in “kVA” stands for:

a) Kilovolt-amperes

b) Kilowatt-amperes

c) Kilowatt-hours

d) Kilovolt-hours

The unit “Watt” is named after:

a) James Watt

b) Michael Faraday

c) Alessandro Volta

d) Georg Simon Ohm

1 megawatt is equal to:

a) 1,000 watts

b) 10,000 watts

c) 100,000 watts

d) 1,000,000 watts

Which measurement indicates the rate at which work is done or energy is transferred?

a) Voltage

b) Power

c) Current

d) Resistance

The power factor of a purely inductive circuit is:

a) Zero

b) One

c) Negative

d) Indeterminate

1 watt is defined as:

a) 1 joule per second

b) 1 volt per ampere

c) 1 ampere per volt

d) 1 joule per minute

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