Physics MCQs: Energy and Energy Transfer

What is gravitational potential energy?

• Energy stored in stretched or compressed objects.

• Energy due to an object's position in a gravitational field.

• Energy possessed by a moving object.

• Energy stored in chemical bonds.

Which of the following best describes elastic potential energy?

• Energy stored due to the deformation of an elastic object.

• Energy possessed by an object due to its height above the ground.

• Energy that is always lost as heat.

• Energy due to the motion of an object.

A roller coaster car reaches the bottom of a hill. What is the main energy transformation taking place?

• Elastic energy to chemical energy.

• Gravitational potential energy to kinetic energy.

• Kinetic energy to thermal energy.

• Chemical energy to sound energy.

A lamp converts electrical energy into light and heat energy. Which statement best describes this conversion?

• Energy is destroyed.

• Energy is conserved but transformed into other forms.

• The lamp uses energy inefficiently.

• All electrical energy is converted to useful energy.

The Law of Conservation of Energy states:

• Energy can be created and destroyed but not transferred.

• Energy cannot be created or destroyed, only transferred or transformed.

• Energy cannot change form under any circumstances.

• Energy can only exist as kinetic or potential energy.

Why does a ball rolling on the ground eventually stop?

• The ball loses energy due to air resistance and friction.

• The ball's energy is destroyed over time.

• Gravity pulls the ball back to its starting point.

• The ball uses up all its kinetic energy.

A machine converts 300 J of input energy into 90 J of useful energy. What is its efficiency?

• 30%

• 50%

• 60%

• 90%

Which of the following energy transfers is the most efficient?

• Useful energy = 60%, wasted energy = 40%.

• Useful energy = 75%, wasted energy = 25%.

• Useful energy = 50%, wasted energy = 50%.

• Useful energy = 25%, wasted energy = 75%.

Which of the following is a renewable energy resource?

• Natural gas

• Solar energy

• Coal

• Nuclear energy

Which energy resource is non-renewable?

• Wind power

• Fossil fuels

• Tidal power

• Biomass