Electricity (LSS NT)

What is the main energy conversion in an electric iron?

• electrical energy to heat energy

• electrical energy to kinetic energy

• electrical energy to light energy

• heat energy to electrical energy

What is the overall energy conversion in a power station that is powered by fossil fuels?

• heat energy to electrical energy

• kinetic energy to electrical energy

• light energy to electrical energy

• potential energy to electrical energy

The unit for resistance is the

• ampere (A)

• newton (N)

• volt (V)

Which component is a resistor?

• A

• B

• C

• D

What is the reason why the lamps in the circuit below do not light up?

• The circuit is not a closed circuit

• The resistor causes the resistance of the circuit to be too high.

• There are too many lamps in the circuit.

• There is no electric cell to provide the voltage needed for the current to pass through the circuit

What happens to the current measured by the ammeter when lamp Q blows?

• The current would become 0 A.

• The current would decrease but not become 0 A.

• The current would increase.

• The current would remain the same.

Our hands should be dry when we are using electrical appliances. This is to

• ensure that the electrical appliances work properly.

• prevent damages to the appliances.

• prevent electric shocks.

• reduce electrical energy consumption.

What cuts off electricity to the house or part of the house if the current becomes too large?

• circuit breaker

• earth wire

• live wire

• wire insulation

Read the attached image and answer the question.

We can reduce electrical energy wastage by using n_______ (6 letters)

Read the attached image and answer the question.

We can reduce electrical energy wastage by switching off electrical a___________ (9 letters)