Question

An average square meter of the solar panel received 1000 joules of energy from the sun every second. Using this information, calculate the power of the input in kilowatts if the panel's surface area is 2 square meters.

a) 0.002 kW
b) 2 kW
c) 1000 kW
d) 500 kW

Answer 1

To find the power input in kilowatts for a 2 square meter solar panel receiving 1000 joules per square meter per second, multiply the power per square meter by the area to get 2000 watts or 2 kilowatts.

Step-by-step explanation:

To calculate the power input in kilowatts, we use the information given that an average square meter of the solar panel receives 1000 joules of energy from the sun every second. Since power is defined as energy per unit time, the power per square meter is 1000 watts or 1 kilowatt (since 1 watt = 1 joule/second). For a panel with a surface area of 2 square meters, we simply multiply the power per square meter by the area:

Power (in watts) = 1000 W/m² × 2 m² = 2000 watts

To convert this to kilowatts, we divide by 1000, which gives us:

Power (in kilowatts) = 2000 watts / 1000 = 2 kW

Therefore, the correct answer is b) 2 kW.