i. The turbine is connected to electric generator, therefore the magnet rotates and electric energy is thus produced.

Question

State whether the following statements are true or false with proper explanation:

i. The turbine is connected to electric generator, therefore the magnet rotates and electric energy is thus produced.

ii. Use of energy is unavoidable in our daily life, but we must use it carefully and only in the required amount.

iii. The machine which converts the potential energy of wind to electrical energy is called wind-turbine.

iv. The potential difference available from a solar cell is independent of its area.

v. The power available from the solar cells is AC.

Answer 1

i. True. 

(The rotating wheels of turbine cause mechanical energy. This energy helps to produce electrical energy.)

ii. True. 

(The energy Supply for everyday use results into lot of pollution. This causes harmful effects in the surrounding environment. Therefore, energy should be used in minimal amount and with great care.)

iii. False. 

(When wind blows, the kinetic energy is present in it. This kinetic energy is converted into electricity. The flowing wind never has a potential energy.)

iv. True. 

(The potential difference available from a solar cell is independent of its area. However, it is dependent on the way in which solar cells are connected.)

v. False. 

(The power available from solar cells is always DC while the domestic appliances that we use work on AC.)