Advertisements
Advertisements
प्रश्न
What is consumed while using different electrical appliances, for which electricity bills are paid?
Advertisements
उत्तर
Electrical energy in kWh which is commercially called a unit of electrical energy.
1 kWh = 1 kW × 1 hr = 1 unit of electricity.
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.
Name the S.I. unit of electrical energy. How is it related to Wh?
How do kilowatt and kilowatt-hour differ?
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.
Speaker ______.
Electrical energy is used to run electric trains.
Electric eel is a ______.
Electric eel can generate ______.
Name the particles of atom?
Choose the odd one:
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
A bulb of power 60 W is used for 12.5 h each day for 30 days. Calculate the electrical energy consumed.
