Work & Energy MCQs with Answers

The dimensions of kinetic energy are?

• A.MLT⁻²
• B.ML²T⁻³
• C.ML²T⁻²
• D.MLT⁻¹

Kinetic energy depends on

• A.density
• B.volume
• C.mass
• D.pressure

Which of the following bodies has the largest kinetic energy?

• A.Mass M and speed V
• B.Mass M and speed 4V
• C.Mass 3M and speed 2V
• D.Mass 2M and speed 3V

In which of the following is electrical energy converted into mechanical energy?

• A.Electric heater
• B.Electric bulb
• C.Washing machine
• D.Electric iron

The product of force and displacement is called?

• A.Power
• B.Energy
• C.Work
• D.Torque

If a machine performs 20 J of work in 10 sec, then its power is ?

• A.2 watt
• B.200 watt
• C.0.5 watt
• D.10 watt

Potential energy of Mass M at Height H is?

• A.MgH
• B.MH
• C.Mg/H
• D.M/gH

Which of the following is an example of potential energy?

• A.A moving car
• B.A stone at height
• C.A ringing bell
• D.Flowing water

Tidal energy is due to ?

• A.Moon only
• B.Sun only
• C.Both Moon and Sun
• D.Earth's rotation only

Which of the following has the same unit as pressure × volume (PV)?

• A.Work
• B.Force
• C.Power
• D.Impulse