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प्रश्न
Fill in the blank with suitable word:
The electricity meter installed in our homes measure electrical energy in the units of ___________.
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उत्तर
The electricity meter installed in our homes measure electrical energy in the units of kilowatt- hour.
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संबंधित प्रश्न
A ball of mass 0.20 kg is thrown vertically upwards with an initial velocity of 20 m s-1. Calculate the maximum potential energy it gains as it goes up.
Two bodies having equal masses are moving with uniform speeds of v and 2v respectively. Find the ratio of their kinetic energies.
Name the device which converts electrical energy into mechanical energy.
Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt-hours.
A bulb lights up when connected to a battery. State the energy change which takes place :
Explain the transformation of energy in the following cases :
(i) A ball thrown upwards.
(ii) A stone dropped from the roof of a building.
Name the energy transfers which occur when :
an electric ball rings
Name the energy transfers which occur when : a torch is on
A ball falls to the ground as shown below :
What is the potential energy of ball at B?
A girl is carrying a school bag of 3 kg mass on her back and moves 200 m on a levelled road. The work done against the gravitational force will be (g = 10 m s–2)
