Solar Energy

A dish solar cooker

(1) has reflecting material of anodized aluminium sheet.

(2) has a reflectivity of less than 50%

(3) needs to track the sun to deliver power of about 0.6 kW.

(4) uses a parabolic dish to concentrate the incident solar radiation

(5) can have the bottom vessel temperature over 1000°C.

Choose the correct answer from the options given below:

In Photo Voltaic system (P V-system) arrange the following from smallest to the largest unit

(A) Module

(B) Array

(C) Solar cell

(D) Array field

Choose the correct answer from the options given below :

'Solar Water Still' is a device to

Given below are two statements : One is labelled as Assertion (A) and. the other is labelled as Reason (R) :

Assertion (A) : Solar ponds, store solar energy in the form of heat.

Reason (R) : Solar ponds contain water with definite gradient of salt concentration.

In the light of the above statements, choose the most appropriate answer from the options given below :

Which among the following are used as semiconductor materials to fabricate solar cells

A) Silicon (Si)

B) Tin oxide (SnO)

C) Cadmium Sulphide (CdS)

D) Gallium Arsenide (GaAs)

Choose the correct answer from the options given below: