Advertisements
Advertisements
प्रश्न
Name the energy changes for each of the following cases:
dynamo
उत्तर
A dynamo converts mechanical energy into electrical energy
APPEARS IN
संबंधित प्रश्न
A body of mass m is moving with a velocity v. Write the expression for its kinetic energy.
Select the renewable and non-renewable sources of energy from the following:
Oil
Explain the principle of generating electricity from hydro energy.
State two advantages of using nuclear energy for producing electricity.
A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (Take g = 10 m s-2)
A body of mass 5 kg falls from a height of 10 m to 4 m. Calculate:
The total energy possessed by the body at any instant? (Take g = 10 ms-2).
How much hydro-electric power is generated in India?
State the energy changes which take place when:
An air gun is loaded and then fired.
State the energy changes which take place when:
Burning of coal.
A body of mass 50 kg has a momentum of 3000 kg−1 ms. Calculate:
(j) the kinetic energy of the body.
(ii) the velocity of the body.
