Question

Calculate the efficiency of a 0.5 m^2 solar panel producing 20W . Assume that the power input is 500 W?

Answer 1

Answer:

500 w = 1.25 m^2

Explanation:

Answer 2

Answer:

Means efficiency of solar panel is $4 \% .$

Explanation:

Given:

A solar panel producing 20 W power on consuming 500 W by solar radiation. Area of solar panel is 0.5 m².

To Find: Efficiency of solar panel

Solution:

Area of solar panel = 0.5 m²

Input power $=\mathbf{E}_{\text {in }}=\mathbf{5 0 0} \mathbf{W}$

Output power $=\mathbf{E}_{\text {out }}=\mathbf{5 0 0} \mathbf{W}$

We know that efficiency of any machine or device is ratio of output energy to input energy, means:

Efficeincy$=\eta=\frac{\mathbf{E}_{\mathrm{out}}}{\mathbf{E}_{\mathrm{in}}} \times 100$

On putting respective value in above equation:

Efficeincy $=\eta=\frac{20}{500} \times 100$

Efficeincy $=\eta=\frac{20}{5}$

Efficiency $=\eta=4 \%$

Means efficiency of solar panel is $4 \% .$