Topic 1

Question 1

Energy is transferred between stores

Answer 1

Thermal, kinetic, gravitational potential, elastic, chemical, magnetic, electrostatic and nuclear

Question 2

Energy is transferred

Answer 2

Mechanically (by a force doing work) electrically (work done by moving charges) by heating or by radiation (like light or sound)

Question 3

Conservation of energy principle

Answer 3

Energy can be transferred but can never be created of destroyed

Question 4

Power

Answer 4

The rate at which work is done (watts) P(W) = E(j) / t(s)

Question 5

Powerful machine

Answer 5

One which transfers a lot of energy in a short space of time

Question 6

Convection occurs only in liquids and gasses

Answer 6

Convection is where energetic particles move away from hotter to cooler regions

Question 7

Water power

Answer 7

There is no pollution no fuel costs and minimal running costs. Can be useful on small islands

Question 8

Charge flow

Answer 8

Current x time

Question 9

Potential difference

Answer 9

Current x resistance

Question 10

Energy transferred

Answer 10

Power x time charge flow (c) xPd