Question

The approximate value of solar constant is ___.

• A. $1.4kW/m^2$
• B. $1.4kW/min$
• C. $1.4kJ/m^2$
• D. $1.4kW/mi{n}^2$

Answer 1

The correct option is A

$1.4kW/m^2$

Solar constant is the amount of solar energy received normally at outer edge of earth's atmosphere by an area of $1m^2$ in 1 second at the mean distance between earth and the sun. It is approximately equal to $1.4{\text{kJs}}^{-1}{\text{m}}^{-2}$ or $1.4{\text{kWm}}^{-2}$.