Domestic Electric Circuits

Q.

What is overloading

Q.

What is C T S or T R S wiring?

Q.

What is an electric meter? Where is it fixed in our house?

Q.

What is meant by overloading of an electric circuit?

Q.

What are the causes of the overloading in electronics?

Q.

State the voltage at which electricity is supplied to our houses.

Q.

What is the value of earth resistance?

Q.

State the colour coding of the three wires in a cable used for wiring in a household electrical circuit.

Q.

What are the old and new colour conventions of the three wires?

Q. In domestic electric circuits, the name of the wire with black insulation is___.

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

Q. A bird can sit on a bare wire and does not get an electric shock . But a man standing on the ground gets an electric shock .When he touches the same wire .Why?

Q. Name ten devices in which electric cells are used.

Q.

How are the electrical appliances connected in a house circuit: in series or in parallel? Give reason.

Q.

What do you mean by short-circuiting of a circuit?

Q. Match the following inventions with their inventors

1. Electric Motor
2. Electric Bulb
3. Telephone

Q.

What is a switch?Which wire is used in on-off switch?

Q.

When a live wire touches a neutral wire, it is called___________________ .

Q. In a house there are six $100W$ bulb, which are used for $6hours$ per day. Calculate the energy consumed in $kWh$ in a day.

1. $3.6kWh$
2. $3600kWh$
3. $36kWh$
4. $360kWh$

Q. The converts 33 kV to 11 kV voltage during the electric power transmission.

1. grid substation
2. city substation
3. main substation
4. electric power plant

Q.

A current of 0.5 A is drawn by a filament of an electric bulb for 10 minutes. The amount of electric charge that flows through the circuit is:

1. 3000 C

2. 30 C

3. 300 C

4. 3 C

Q.

Name two devices in which an electric cell is used.

Q. In domestic electric circuit, appliances are connected in parallel. Why?

1. because it consumes less power.
2. because if one appliance stops working, other appliances keep on working.
3. it is comparatively easier to create.
4. because it is longer than series supply so can be distributed to the whole house.

Q.

What is the color code for the insulation on the earth wire?

Q.

Amount of electrical energy consumed in the houses is measured by an _________ .

Q.

Electric meter measures the consumption of energy in joules.

1. True
2. False

Q.

How are the electric charge, electric current and time related to each other ?

Q.

What is meant by overloading an electric circuit?

Q.

What are the two types of electricity as proposed by Benjamin Franklin ?

Q. A filament bulb 500 W, 100 V is to be used in a 230 V main supply. When a resistance R is connected in series, it works perfectly and the bulb consumes 500 W . The value of R is :-

1. 26$\Omega$
2. 13$\Omega$
3. 236$\Omega$
4. 46$\Omega$

Q.

The wire having a black plastic covering is a

1. live wire

2. neutral wire

3. earth wire

4. none of these