Question 1: Define the function of the Live wire in a household electrical circuit.

Answer: The Live wire carries current from the power supply to the appliance.

Question 2: Explain why the Neutral wire is connected to the ground at the electrical supply point.

Answer: To complete the circuit and prevent excess voltage, ensuring safety and proper functioning.

Question 3: Describe the primary safety purpose of the Earth wire in household wiring.

Answer: The Earth wire provides a safe path for current to flow into the ground if a fault occurs, preventing electric shock.

Question 4: Calculate the current flowing through a 230 V appliance if the power rating is 460 W. Show your formula and units.

Answer: I = P / V; I = 460 W / 230 V = 2 A

Question 5: Identify which wire (Live, Neutral, or Earth) is most likely to carry current during normal operation of an appliance.

Answer: Live

Question 6: Fill in the blank: The Earth wire is connected to a _______ rod or plate buried in the ground to safely dissipate excess electricity.

Answer: ground

Question 7: List two safety precautions when working with household wiring involving Live, Neutral, and Earth wires.

Answer: Turn off the main power supply before working, and avoid touching exposed wires.

Question 8: Analyze the scenario: An appliance is functioning normally, but the Earth wire is disconnected. What potential hazard could this pose?

Answer: Disconnection of the Earth wire removes the safety path for electrical faults, increasing the risk of electric shock or fire if a fault occurs.

Question 9: Describe how the presence of a Ground Fault Circuit Interrupter (GFCI) enhances safety in homes, particularly concerning the Earth wire.

Answer: A GFCI detects small current leaks to the Earth wire and automatically disconnects power, preventing electric shocks and fires.

Question 10: In what way does the role of the Neutral wire differ from that of the Earth wire in household electrical systems?

Answer: The Neutral wire completes the circuit by returning current to the supply, while the Earth wire is a safety path to prevent electric shock in case of faults.