Power calculations beta

Last updated 5 months ago

14 questions

Power calculations beta

Last updated 5 months ago

14 questions

Question 1

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

Question 2

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

Question 3

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

Question 4

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

Question 5

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

Question 6

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

Question 7

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

Question 8

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

Question 9

A motor uses 5 kJ of energy in 3 minutes. What is the power of the motor?

Question 10

10.

A laptop consumes 6 kJ of energy in 5 minutes. Find its power.

Question 11

11.

A blender uses 1.2 kJ of energy in 2 minutes. What is its power?

Question 12

12.

A drill operates with 9 kJ of energy over 3 minutes. Calculate its power.

Question 13

13.

8. A vacuum cleaner uses 15 kJ of energy in 10 minutes. What is its power?

Question 14

14.

9. A light bulb consumes 2.5 kJ of energy over 5 minutes. Calculate the power of the light bulb.