Advertisements
Advertisements
प्रश्न
How do kilowatt and kilowatt-hour differ?
उत्तर
| Kilowatt | Kilowatt-hour | |
| i. | Power in electrical kilowatts is its SI unit. | Commercial electrical energy is measured in kilowatt-hours. |
| ii. | The amount of energy expended in a single second. | A power appliance uses 1 kW of energy in 1 hour. |
| iii. | 1 watt = `(1 "J")/(1 "S")` | 1 kWh = 3600000 J |
APPEARS IN
संबंधित प्रश्न
A bulb is connected to a battery of p.d 4 V and internal resistance 2.5 Ω. A steady current of 0.5 A flows through the circuit. Calculate:
- the total energy supplied by the battery in 10 minutes
- the resistance of the bulb and
- the energy dissipated in the bulb in 10 minutes.
Write an expression for the electrical energy spent in flow of current through an electrical appliance in terms of current, resistance and time.
An electric toaster draws current 8 A in a circuit with source of voltage 220 V. It is used for 2 h. Find the cost of operating the toaster if the cost of electrical energy is ₹ 4.50 per kWh.
Find out the energy conversion that take place in the following.
Electric Iron box : _______ _______
Find out the energy conversion that takes place in the following.
Electric fan : ________
What are the different forms of energy?
What are the different ways electricity can be generated?
Units of electrical energy are ______
Name the physical quantity which is measured in kWh.
Name the physical quantity which is measured in Wh.
