Assertion (A): A wind mill will be more effective if it is placed at a higher elevation above the ground than a lower one.
Reason (R): Generally, the wind speed increases with altitude above the earth's surface.
In the light of the above statements, choose the most appropriate answer from the options given below:
Analysis of Assertion (A)
Assertion (A) states that a windmill is more effective at a higher elevation than a lower one. This is generally true because wind speeds are typically higher and less turbulent at greater heights above the ground. Higher wind speeds mean more kinetic energy available for the windmill to capture, leading to increased effectiveness and power generation.
Analysis of Reason (R)
Reason (R) states that wind speed generally increases with altitude above the Earth's surface. This is a well-established meteorological principle. Friction from the ground and surface obstacles slows down wind near the surface. As altitude increases, this friction effect diminishes, allowing winds to blow faster.
Relationship Between Assertion and Reason
The reason (R) directly explains the assertion (A). The increase in wind speed with altitude (R) is the underlying physical principle that makes placing a windmill at a higher elevation (A) more effective. The stronger winds captured at higher altitudes result in better windmill performance.
Conclusion
Both the Assertion (A) and the Reason (R) are factually correct. Furthermore, the Reason (R) provides a scientifically sound explanation for why the Assertion (A) is true.
Therefore, the correct option is that both (A) and (R) are correct, and (R) is the correct explanation of (A).
Important Questions from Renewable Energy - Teaching
- Arrange the following in descending order of installed capacity of total solar power as of August, 2025:
A. Gujarat
B. Rajasthan
C. Maharashtra
D. Tamil Nadu
Choose the correct answer from the options given below: - The biogas is a mixture of
(1) Methane and ethane
(2) Methane and hydrogen
(3) Ethanol and methane
(4) Oxygen and butane Geothermal power plants are much like fossil and nuclear plants with exception of no requirements of:
A. Vapour dominated hydrothermal resources
B. Boiler
C. Fission reactor
D. Turbine generator
Choose the correct answer from the options given below:
Given below are two statements. One labelled as Assertion (A) and the other labelled as Reason (R) :
Assertion (A) : OTEC power plants have low efficiences.
Reason (R) : Efficiency is governed by 2nd law of thermodynamics.
Choose the correct answer :- Given below are two statements. One labelled as Assertion (A) and the other labelled as Reason (R) :
Assertion (A) : The efficiency of a silicon solar cell decreases with increase in temperature.
Reason (R) : The intrinsic resistance of the solar cell increases with rise in temperature.
Choose the correct answer :
