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
Name the S.I. unit of electrical energy. How is it related to Wh?
List the names of three electrical gadgets used in your house. Write their power, voltage rating and approximate time for which each one is used in a day. Hence find the electrical energy consumed by each in a month of 30 days.
When a current I flows through a resistance R for time t, the electrical energy spent is given by ______.
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 takes place in the following.
Electric fan : ________
Electrical energy is used to run electric trains.
Electric eel can generate ______.
Name the particles of atom?
What is electric energy?
The ground state energy of a hydrogen atom is - 13.6 eV When its electron is in the first excited state, its excitation energy is
