What is the primary unit used to measure electrical energy in homes?

Kilowatt-hour (kWh)

Which of the following is true about A.C. in India? A) It runs at 110 V B) It changes direction 50 times a second C) It is a form of direct current D) It is generated at 220 V

B) It changes direction 50 times a second

Riddle: I am the wire that carries current to your devices, but I can be dangerous if touched. What am I?

Live wire

True or False: The neutral wire is always at a voltage of 220 V.

False. The neutral wire is at 0 V.

Electricity generated at power stations is initially produced at ______.

11 kV

What device stops excessive current from damaging electrical appliances?

Fuse

Which of the following wires is typically colored green or yellow? A) Live wire B) Neutral wire C) Earth wire D) None of the above

C) Earth wire

Fill in the blank: The formula for electrical power is ______.

P = V × I

What happens to a fuse when there is too much current flowing through it?

It melts and breaks the circuit.

True or False: An electric meter measures energy consumption in joules.

False. An electric meter measures energy consumption in kilowatt-hours (kWh).

What type of current flows in one direction only?

Direct current (D.C.)

Riddle: I am a safety device that can automatically turn off the circuit in less than a second. What am I?

Miniature Circuit Breaker (MCB)

True or False: Overloading a circuit occurs when too many appliances draw more current than the circuit can handle.

True

Fill in the blank: A fuse wire is typically made of an alloy of ______.

Lead and tin

Which wire completes the circuit by connecting back to the source?

Neutral wire

True or False: The earth wire carries current to the appliance.

False. The earth wire is for safety and connects to the ground.

What is the maximum current rating of a thicker fuse compared to a thinner fuse?

A thicker fuse can handle more current.