Electricity Quiz

What are some variables that can affect the brightness of a bulb in a circuit?

• Number of batteries in series

• Number of bulbs in series

• Number of plugs in a socket

• Number of bulbs in parallel

Answer explanation

The number of batteries in series can affect the brightness of a bulb in a circuit by providing more voltage to the bulb.

Which bulb becomes brighter when more batteries are arranged in series in a circuit?

• B

• A

• D

• C

Answer explanation

Bulb B becomes brighter when more batteries are arranged in series in a circuit. Therefore, the correct choice is B.

What happens when too much electric current flows through a bulb?

• The bulb becomes dimmer

• The filament melts and the bulb blows

• The bulb becomes brighter

• The bulb turns off

Answer explanation

When too much electric current flows through a bulb, the filament melts and the bulb blows. This is because the excessive current generates heat, causing the filament to reach its melting point and ultimately leading to the bulb failing.

Which bulb becomes less bright when more bulbs are arranged in series in a circuit?

• B

• C

• D

• E

Answer explanation

Bulb C becomes less bright when more bulbs are arranged in series in a circuit.

What happens when more bulbs are arranged in parallel in a circuit?

• The bulbs flicker on and off

• The bulbs do not light up

• The brightness of each bulb remains unchanged

• The brightness of each bulb decreases

Answer explanation

When more bulbs are arranged in parallel in a circuit, the brightness of each bulb remains unchanged as they each receive the full voltage of the circuit.

What is the reason for conserving electricity?

• To reduce the brightness of bulbs

• To save money on electricity bills

• To increase fossil fuel usage

• To ensure fossil fuels last longer

Answer explanation

To ensure fossil fuels last longer

How can we help ensure there will be electricity available for future generations?

• Ignore electrical safety measures

• Increase electricity consumption

• Conserve electricity

• Use electricity unsafely

Answer explanation

To help ensure there will be electricity available for future generations, it is important to conserve electricity. By reducing unnecessary consumption, we can contribute to sustainable energy use and availability for the future.

What can electricity cause if not used in a safe way?

• Electric shocks or death

• Brighter bulbs

• Increased energy efficiency

• Faster electricity generation

Answer explanation

Electricity can cause electric shocks or death if not used in a safe way, making it crucial to handle it with caution.

What should you not do when handling electrical appliances?

• Touch power sockets with wet hands

• Use appliances with frayed wires

• Repair appliances yourself

• Put too many plugs in one socket

Answer explanation

When handling electrical appliances, you should not touch power sockets with wet hands as it can lead to electric shock.

What is the purpose of a battery in an electric circuit?

• To control the brightness of bulbs

• To provide energy source

• To act as an insulator

• To prevent electric shocks

Answer explanation

The purpose of a battery in an electric circuit is to provide an energy source for the components to function.