Question

Solar cell A produces 100 joules of energy, when a light source is shown on it for 3 minutes. Solar cell B produces 200 joules of energy when the same light source is shown on it for 5 minutes. Which solar cell works better? A) Solar cell B, because it produces more energy. B) Solar cell B, because it generates more power. C) Solar Cell A, because it produces energy quicker. D) Solar Cell A, because it generates a greater wattage. Eliminate

Answer 1

Answer: (B). Solar cell B, because it generates more power.

Explanation:

Given that,

For solar cell A

Energy = 100 Joules

Time = 3 minutes = 180 sec

Power of cell A

Power = Energy/Time

$P = \dfrac{100}{180}\ Watt$

$P = 0.55\ Watt$

For solar cell B

Energy = 200 joules

Time = 5 minutes = 300 sec

Power of cell B

Power = Energy/Time

$P = \dfrac{200}{300}\ watt$

$P = 0.66\ Watt$

Hence, Solar cell B, because it generates more power.

Answer 2

The Answer is B

Explanation: