1.

A solar plate is rectangular in shape (2.5×2.0)m2, which generates an electric current of 2 Amp through a circuit of 100Ω. The efficiency of solar plate be n then calculate n/5.Solar constant =1400 W/m2 

Answer»

Pout of solar plate = I2R

Pout of solar plate = 2 × 2 × 100 W

Pin of solar plate = 200 × 2.5 × 2

Efficiency = Pout / Pin 

Efficiency = 2 × 2 × 100 / 200 × 5 =  40%

n/5 = 40 × 1/5 = 8

So n/5 = 8



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