Energy and Power Quiz

What is the definition of energy?

• The ability to do work

• The ability to create matter

• The ability to generate heat

• The ability to produce light

Which equation is used to calculate efficiency?

• (useful energy out ÷ total energy in) × 100

• power = energy ÷ time

• work done = force × distance

• energy = mass × velocity

How is power calculated according to the table?

• P = E ÷ t

• P = F × d

• P = m × a

• P = V × I

What is the formula for work done?

• W = F × d

• W = m × g

• W = P × t

• W = E ÷ t

In the example provided, what is the efficiency of the light bulb?

• 20%

• 40%

• 50%

• 80%

If the useful energy out is 50 watt hours and the total energy in is 250 watt hours, what is the efficiency?

• 20%

• 25%

• 30%

• 35%

What does the equation P = E ÷ t represent?

• Power

• Efficiency

• Work done

• Energy

Which of the following is NOT a property listed in the table?

• Efficiency

• Power

• Work done

• Velocity