Power calculations beta

Last updated 7 months ago

14 questions

1

Last updated 7 months ago

14 questions

1

A fan uses 2.4 kJ of energy over a period of 4 minutes. Calculate its power.

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A) 40 watts

B) 60 watts

C) 120 watts

D) 240 watts

A) 150 watts

B) 200 watts

C) 300 watts

D) 600 watts

A) 100 watts

B) 150 watts

C) 200 watts

D) 300 watts

A) 150 watts

B) 200 watts

C) 250 watts

D) 300 watts

A) 90 watts

B) 120 watts

C) 180 watts

D) 450 watts

A) 15 W

B) 20 W

C) 25 W

D) 30 W

A) 25 W

B) 30 W

C) 33.3 W

D) 35 W

A light bulb uses 120 joules of energy in 2 seconds. What is the power of the light bulb?

A) 40 watts

B) 60 watts

C) 120 watts

D) 240 watts

A microwave uses 450 joules of energy in 3 seconds. What is the power of the microwave?

A) 150 watts

B) 200 watts

C) 300 watts

D) 600 watts

A motor does 1,200 joules of work in 6 seconds. How much power does the motor produce?

A) 100 watts

B) 150 watts

C) 200 watts

D) 300 watts

An electric heater uses 2,000 joules of energy in 10 seconds. What is the power of the heater?

A) 150 watts

B) 200 watts

C) 250 watts

D) 300 watts

A fan consumes 900 joules of energy in 5 seconds. What is the power of the fan?

A) 90 watts

B) 120 watts

C) 180 watts

D) 450 watts

A heater uses 3 kJ of energy in 2 minutes. What is its power?

A) 15 W

B) 20 W

C) 25 W

D) 30 W

A microwave uses 4 kJ of energy in 2 minutes. What is its power?

A) 25 W

B) 30 W

C) 33.3 W

D) 35 W