Domestic Electric Circuit

Q. In households, we use parallel electrical connections instead of series, in order to:

1. Use all appliances at the same voltage
2. Get the same current though all the appliances
3. Use all the appliances at their maximum power
4. Avoid short circuit and overloading

Q. The thick and long pin in a three pin plug is connected to.

1. live wire
2. earth wire
3. neutral wire

Q. What colour is used for the insulation of a neutral wire?

1. Red
2. Light blue
3. Saffron
4. Baby pink

Q. Match the following with the correct pair:

1. Safety device
2. ON-OFF device
3. Three hole device

Q. Sort the following electric components in the correct order from the mainline to an appliance of a household:

1. kWh meter
2. MCB
3. Switchboard
4. Main fuse
5. Electric pole
6. Home appliance

1. $5-1-2-4-3-6$
2. $1-5-4-2-6-3$
3. $6-5-1-2-4-3$
4. $5-1-4-2-3-6$

Q.

Which of the following acts as a circuit protecting device?

1. fuse

2. switch

3. inductor

4. conductor

Q. Write the SI and cgs units of power. How they are related?