A solar cell (10×15 cm) produces a voltage of 0.5 V and a current of up to 2.5 A. If the solar insolation is 800 W/m², calculate the efficiency of the solar cell.

Correct option is B

1. Given Data:
· Voltage (V) = 0.5 V
· Current (I) = 2.5 A
· Area of the solar cell = 10 cm×15 cm=150 cm2=0.015 m2
· Solar insolation = 800 W/m²
2. Power Output of the Solar Cell: The power output (Poutput​) is calculated using the formula:
Poutput​=V×I
Substituting values:
Poutput=0.5 V×2.5 A=1.25 W
3. Input Power to the Solar Cell: The input power (Pinput​) is calculated using the formula:
Pinput =Insolation×Area
Substituting values:
Pinput =800 W/m2×0.015 m2=12 W
4. Efficiency Calculation: The efficiency (η) of the solar cell is given by:

Information Booster: 1. Efficiency Formula:
· Efficiency of a solar cell depends on its ability to convert the incident solar energy into electrical energy.
2. Factors Affecting Efficiency:
· Insolation: Higher insolation improves potential output.
· Temperature: Higher temperatures typically reduce efficiency.
· Material Quality: Silicon type and impurities influence performance.
3. Practical Applications:
· Efficiency helps determine the suitability of solar cells for specific applications, such as rooftop solar panels or small-scale energy generation.
Additional Knowledge: · Efficiency (~10%): Typical for commercial silicon-based solar cells under standard conditions.
· Area Importance: Larger solar cells can capture more sunlight and generate more power.
· Solar Insolation: Directly proportional to input energy; varies with location and weather.