Advertisements
Advertisements
प्रश्न
What changes in energy occur in an electric heater?
Advertisements
उत्तर
In an electric heater, electrical energy changes to heat energy.
APPEARS IN
संबंधित प्रश्न
An electric motor takes 5 A from a 220 V line. Determine the power of the motor and the energy consumed in 2 h.
At what frequency is AC supplied to residential houses?
What is consumed using different electrical appliances, for which electricity bills are paid?
What is the current I in the given circuit (Fig. )?

State three factors on which the heat produced in a metallic wire due to passage of current in it depends.
Why is the heating element of an electric oven wound on a helix? State the reason.
What is the function of the split rings in a d.c. motor?
An electric heater is rated 220 V, 550 W. Electrical energy is also measured in kWh. What do you understand by a kilo-watt-hour?
The following table gives the electrical appliances used, their power and the average time for which they are used each day in a home. Estimate the monthly electricity bill if the rate is 60 paise per unit.
| Sr.no. | Name | Nos. | Power rating | Time/day |
| 1 | Bulb | 4 | 100 W | 7.5 hr |
| 2 | Fans | 2 | 50 W | 10 hr |
| 3 | T.V. | 1 | 100 W | 2 hr |
| 4 | Iron | 1 | 500 W | 1 hr |
| 5 | Electric stove | 1 | 750 W | 2 hr |
