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Electricity GCSE (Test 3)

Subject: Physics

Level: Intermediate

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Instructions:

This test contains 10 multiple-choice questions on the topic of Electricity taught at GCSE level.

Each question has a set of answer choices. Choose the best answer for each question.

If you would like to read more about the topic please read our study notes online.

Q1.

The earth wire in a mains electrical cable is primarily used for:

  • 1. Carrying the current to the appliance.

  • 2. Reducing the amount of energy used by the appliance.

  • 3. Providing a path for current in case of a fault.

  • 4. Ensuring the appliance operates at the correct voltage.

Q2.

Which statement best describes how a fuse works?

  • 1. It provides a high resistance to current flow.

  • 2. It stores excess electrical energy.

  • 3. It amplifies the current flowing through the circuit.

  • 4. It melts when the current flowing through it exceeds a certain value.

Q3.

Which of the following is NOT a typical use of insulating materials in electrical appliances?

  • 1. To prevent electric shock.

  • 2. To protect the wires from damage.

  • 3. To conduct electricity.

  • 4. To prevent short circuits.

Q4.

Double insulated appliances do not require an earth wire. Why?

  • 1. They use less electricity.

  • 2. Their outer casing is made of an insulating material, preventing contact with live parts.

  • 3. They have built-in fuses.

  • 4. They operate at a lower voltage.

Q5.

What happens when a fuse blows (melts)?

  • 1. The appliance continues to operate normally.

  • 2. The voltage in the circuit increases significantly.

  • 3. The earth wire takes over the function of the fuse.

  • 4. The circuit is broken, stopping the flow of current.

Q6.

A standard UK electrical cable for appliances contains three wires. Which of the following correctly identifies these wires and their functions?

  • 1. Live (carries current), Neutral (safety connection), Earth (returns current)

  • 2. Live (carries current), Neutral (returns current), Earth (safety connection)

  • 3. Live (returns current), Neutral (carries current), Earth (no function)

  • 4. Live (safety connection), Neutral (carries current), Earth (returns current)

Q7.

Which of the following is the correct voltage and frequency for mains electricity in the UK?

  • 1. 120 V, 60 Hz

  • 2. 110 V, 50 Hz

  • 3. 230 V, 80 Hz

  • 4. 230 V, 50 Hz

Q8.

Which of the following statements best describes the difference between AC and DC current?

  • 1. AC current is used in batteries, while DC current is used in mains electricity.

  • 2. AC current flows in one direction, while DC current changes direction.

  • 3. AC current is more dangerous than DC current.

  • 4. AC current changes direction, while DC current flows in one direction.

Q9.

What is the primary function of the earth wire in an electrical circuit?

  • 1. To carry the current to the appliance.

  • 2. To provide a safe path for the current to flow to the ground in case of a fault.

  • 3. To provide a path for the current to flow back to the source.

  • 4. To increase the voltage of the current.

Q10.

What is the purpose of a fuse in an electrical circuit?

  • 1. To protect the circuit from overcurrent.

  • 2. To increase the current flow.

  • 3. To reduce the voltage.

  • 4. To provide a switch for the circuit.

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