A square solar panel has the dimensions 02.m x 0.2 m. Under the sunlight, the in

Question

A square solar panel has the dimensions 02.m x 0.2 m. Under the sunlight, the intensity of the light is 1000W/m^2 and the panel a delivers a current of 1.6A at a voltage of 15V. is the efficiency of this solar panel energy? 12% 40% 60% 96& The following are drawings of electric field lines between two charged objects. Which of them is incorrect? Moving a point charge of 3.2x10^19 C between two points in a conducting wire requires 8.0x 10^19 J of work. What is the voltage difference between these two points?

Explanation / Answer

3) correct option is (c)

P = VI = 1.6*15 = 24 W

I =P/A

Ptot = IA = (1000x0.2x0.2) = 40 W

Px100%/Ptot = 24x100/ 40 = 60%

4) Correct option is (a)

For positive chagre electric field lines are outwards

For negative chagre electric field lines are intwards

But in fiure (a) filed lines of negative chage are outward. so it is incorrect

5) Correct option is (a)

W = change in electric potential enegy = qV

V =W/q = (8x10^-19)/(3.2x10^-19) = 2.5 V

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