ICSE ICSE Class 8 - CISCE Question Bank Solutions

The unit in which we pay the cost of electricity is ..........

The electrical energy consumed in a house is measured by ...............

In a household electrical circuit, the appliance are connected in ............with the mains.

One kilowatt hour is equal to ............ joule.

One kilowatt is equal to

The purpose of an electric meter in a house is

If out of the two lighted bulbs in a room, one bulb suddenly fuses, then

From where does the electricity come to our home ?

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

State the purpose of kWh meter.

For which unit do we pay our electricity bill?

The diagram below in figure shows the reading on the dials of a meter. State what is its reading.

One day the meter reading is found to be 7643 units while the next day, it was 7657 units. What is the consumption of electricity in a day?

Name the unit in which you pay the cost of your electricity bill. How is it related to joule?

If an appliance of power P watt is used for time t hour. How much electrical energy is consumed in kWh?

What is an electric fuse? State its purpose in the household electrical circuit.

Figure shows two ways of connecting the three bulbs A, B and C to a battery. Name the two arrangements. Which of them do you prefer to use in a household circuit? Give a reason to support your answer.

Draw a labelled diagram with the necessary switches to connect a bulb, a fan and a plug socket in a room with the mains. In what arrangement will you connect them to the mains?

An electric iron of power 1.5 kW is used for 30 minutes to press the clothes. Calculate the electrical energy consumed in

1. kilowatt-hour
2. joule.

Assuming the electric consumption per day to be 12 kWh and the rate of electricity to be? 6.25 per unit, find how much money is to be paid in a month of 30 days?