Year 9 LC5 Physics Assessment MCQ

Which of the following is an energy store?

• Electric
• Radiation
• Kinetic
• Transfer

What type of energy is stored in a stretched spring?

• Gravitational
• Elastic potential
• Kinetic
• Nuclear

Which formula is used to calculate gravitational potential energy?

• ½ke²

• ½mv²

• m x g x h

• ma

What happens to the energy in a system when work is done?

• It disappears
• It is stored
• It is transferred
• It is created

What does a Sankey diagram show?

• Only useful energy
• Wasted energy only
• Energy efficiency
• Energy transfers with input, output and waste

Which quantity is calculated using: useful energy output ÷ total energy input?

• Work done
• Efficiency
• Power
• Potential energy

Why do metals conduct thermal energy well?

• They are shiny
• They have free electrons
• They have low density
• They are solid

What unit is used to measure power?

• Joules
• Watts
• Newtons
• Volts

Which method reduces energy transfer in a house?

• Painting the walls
• Using thicker curtains
• Installing cavity wall insulation
• Using light bulbs

What is the equation for power using energy and time?

• P = E — t

• P = E / t
• P = F / d
• P = m — g