i. Which connection will give maximum potential difference? ii. Give one advantage and one disadvantage of this energy.

Question

Observe the connections of cells shown in the following images.

i. Which connection will give maximum potential difference?

ii. Give one advantage and one disadvantage of this energy.

iii. Write the name of the device shown in the above diagram.

iv. Write briefly the work of this device.

Answer 1

i. The solar cells shown in the diagram (a) are connected in series. This gives maximum potential difference.

ii. Advantage of Solar energy: Solar energy is ecofriendly which does not create pollution. It is boundless source.

Disadvantage of solar energy: Solar energy is available only when sun is in the sky. Therefore, it has to be stored in batteries.

iii. Steam turbine is the device shown in the above diagram.

iv. Turbine is a device with the blades. When the flow of liquid or gases is directed on the blades of the turbine, they rotate. The rotation produces kinetic energy. This turbine is then used to rotate the magnet in the electric generator. For this purpose, turbines are connected with the generators. The magnets rotate and produce electric energy by electromagnetic induction. The turbines working on steam are used in large commercial power generation plants.