EASY
10th CBSE
IMPORTANT
Earn 100

What should be the minimum wind speed (in km/h) for the satisfactory working of a wind-powered electric generator?
(Choose the correct answer from values given in km/h: 5, 15, 25).

50% studentsanswered this correctly

Important Questions on Sources of Energy

EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 3 - Sources of Energy>Very Short Answer Type Questions>Q 6

Write one use of wind energy

(a) in the past

(b) at present.

EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 3 - Sources of Energy>Very Short Answer Type Questions>Q 7
Why is the copper tube of a solar water heater painted black from outside?
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 3 - Sources of Energy>Very Short Answer Type Questions>Q 8
What type of reactions occurring inside the sun produce solar energy?
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 3 - Sources of Energy>Very Short Answer Type Questions>Q 9
Name some of the solar energy devices.
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 3 - Sources of Energy>Very Short Answer Type Questions>Q 10
What type of reflector is used in a box-type solar cooker?
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 3 - Sources of Energy>Very Short Answer Type Questions>Q 11
What is the range of temperature which can be achieved in a box-type solar cooker in two to three hours?
EASY
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 3 - Sources of Energy>Very Short Answer Type Questions>Q 12
Name the device which converts sunlight into electricity. (Solar cell / solar cooker)
MEDIUM
10th CBSE
IMPORTANT
Science for Tenth Class Part - 1 Physics>Chapter 3 - Sources of Energy>Very Short Answer Type Questions>Q 13
How much solar energy will be received by 1 m2 area in one hour if the solar constant be 1.4 kW/m2?