Lakhmir Singh & Manjit Kaur - Physics

Book: Lakhmir Singh & Manjit Kaur - Physics

Chapter: 3. Sources of Energy

Subject: Physics - Class 10th

Q. No. 37 of Multiple Choice Questions (MCQs)-Pg-141

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37

If the solar constant is 1.4 kW/m2, then the solar energy received by 1 m2 area in one hour is :

From the solar constant we deduce that

1.4 kW of power is incident upon every 1m2 of area.


i.e. the total energy incident in 1 hr over an area of 1 m2 will be


= 1.4 kW x 1 hr


(Since P=E/t or E=P x t)


Hence, energy = 1.4 kWh


Converting into Kj we get 5040 Kj)

Chapter Exercises

Very Short Answer Type Questions-Pg-121
Very Short Answer Type Questions-Pg-130
Very Short Answer Type Questions-Pg-140
Very Short Answer Type Questions-Pg-148
Very Short Answer Type Questions-Pg-156
Very Short Answer Type Questions-Pg-161
Short Answer Type Questions-Pg-122
Short Answer Type Questions-Pg-131
Short Answer Type Questions-Pg-140
Short Answer Type Questions-Pg-148
Short Answer Type Questions-Pg-157
Short Answer Type Questions-Pg-161
Questions Based on High Order Thinking Skills (HOTS)-Pg-123
Questions Based on High Order Thinking Skills (HOTS)-Pg-132
Questions Based on High Order Thinking Skills (HOTS)-Pg-142
Questions Based on High Order Thinking Skills (HOTS)-Pg-150
Questions Based on High Order Thinking Skills (HOTS)-Pg-159
Long Answer Type Questions-Pg-122
Long Answer Type Questions-Pg-131
Long Answer Type Questions-Pg-141
Long Answer Type Questions-Pg-149
Long Answer Type Questions-Pg-157
Multiple Choice Questions (MCQs)-Pg-122
Multiple Choice Questions (MCQs)-Pg-131
Multiple Choice Questions (MCQs)-Pg-141
Multiple Choice Questions (MCQs)-Pg-149
Multiple Choice Questions (MCQs)-Pg-158
Multiple Choice Questions (MCQs)-Pg-161

More Exercise Questions

29

A solar water heater cannot be used to get hot water on:
30

At a hydro power plant:
31

The part of box-type solar cooker which is responsible for producing greenhouse effect is:
32

Solar cells are made of:
33

The value of solar constant is
34

The radiations present in sunlight which make a solar cooker work are
35

In order to make an efficient solar cooker, the cover box should be made of :
36

The minimum speed of wind necessary for the satisfactory working of a wind generator to produce electricity is about :
37

If the solar constant is 1.4 kW/m2, then the solar energy received by 1 m2 area in one hour is :
38

A solar cooker may not cook food if :

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