The sun delivers 10^3 W / m^2 of electromagnetic flux to the earth's surface. The total power t

Name: Problem 45, Chapter 17: A Complete Resource Book in Physics for JEE Main
Uploaded: 2021-10-03T04:48:29-08:00
Duration: 39 s
Channel: Khoobchandra Agrawal
Description: The sun delivers 10^3 W / m^2 of electromagnetic flux to the earth's surface. The total power that is incident on a roof of dimensions 8 m ×20 m, will be (A) 6.4 ×10^3 W (B) 3.4 ×10^4 W (C) 1.6 ×10^5 W (D) None of these

step 1 Hi friends, here it is given intensity of wave reaching on the earth is 10 to the power 3 watt p

Question

The sun delivers $10^{3} \mathrm{~W} / \mathrm{m}^{2}$ of electromagnetic flux to the earth's surface. The total power that is incident on a roof of dimensions $8 \mathrm{~m} \times 20 \mathrm{~m}$, will be (A) $6.4 \times 10^{3} \mathrm{~W}$ (B) $3.4 \times 10^{4} \mathrm{~W}$ (C) $1.6 \times 10^{5} \mathrm{~W}$ (D) None of these

   The sun delivers $10^{3} \mathrm{~W} / \mathrm{m}^{2}$ of electromagnetic flux to the earth's surface. The total power that is incident on a roof of dimensions $8 \mathrm{~m} \times 20 \mathrm{~m}$, will be
(A) $6.4 \times 10^{3} \mathrm{~W}$
(B) $3.4 \times 10^{4} \mathrm{~W}$
(C) $1.6 \times 10^{5} \mathrm{~W}$
(D) None of these

A Complete Resource Book in Physics for JEE Main

Sanjeev Kumar 1st Edition

Chapter 17, Problem 45

Instant Answer

Solved by Expert Khoobchandra Agrawal

10/03/2021

Step 1

In this case, the intensity of the solar radiation is given as $10^{3} \mathrm{~W} / \mathrm{m}^{2}$ and the area of the roof is $8 \mathrm{~m} \times 20 \mathrm{~m}$. Show more…

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The sun delivers $10^{3} \mathrm{~W} / \mathrm{m}^{2}$ of electromagnetic flux to the earth's surface. The total power that is incident on a roof of dimensions $8 \mathrm{~m} \times 20 \mathrm{~m}$, will be (A) $6.4 \times 10^{3} \mathrm{~W}$ (B) $3.4 \times 10^{4} \mathrm{~W}$ (C) $1.6 \times 10^{5} \mathrm{~W}$ (D) None of these

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Key Concepts

Solar Irradiance

Solar irradiance is the measure of the power of electromagnetic radiation per unit area received from the Sun, typically expressed in watts per square meter (W/m²). It is a fundamental concept in understanding how much energy is available from the Sun at Earth's surface for various applications including heating and solar power generation.

Area Calculation

Determining the area of a surface is crucial when calculating the total energy incident on that surface. By computing the area (for example, length multiplied by width for rectangular surfaces), one can multiply it by the irradiance to obtain the total power received.

Multiplication of Flux and Area

This key concept involves the relationship where total power is equal to the product of the irradiance (or flux) and the area over which it is distributed. This principle is widely used in physics and engineering to determine the energy input over a given surface area.

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