Quiz on Power in Physics

What is the definition of power in physics?

• The amount of energy consumed

• The rate at which work is done

• The total energy used

• The force applied over a distance

Which of the following is the correct unit of power?

• Joule

• Watt

• Newton

• Ampere

If a machine does 200 Joules of work in 10 seconds, what is its power?

• 20 Watts

• 200 Watts

• 2 Watts

• 0.5 Watts

Power can be calculated using which of the following formulas?

• $$\text{Power} = \text{Energy} \times \text{Time}$$

• $$\text{Power} = \frac{\text{Energy}}{\text{Time}}$$

• $$\text{Power} = \text{Energy} + \text{Time}$$

• $$\text{Power} = \text{Energy} - \text{Time}$$

What is the relationship between work and energy?

• Work is a type of energy

• Energy is the ability to do work

• Work and energy are unrelated

• Work is always greater than energy

Fill in the blank: The unit of energy is the __________.

Fill in the blank: If a light bulb uses 60 Watts of power for 2 hours, it consumes __________ Joules of energy.

Open-ended: Explain why power is an important concept in physics.

Match the following units with their corresponding quantities:

What is the power of a device that uses 300 Joules of energy in 15 seconds?

• 20 Watts

• 15 Watts

• 25 Watts

• 30 Watts