Fuel Cell: Direct Energy Conversion
A fuel cell functions as an electrochemical device.
Its fundamental purpose is to directly transform the chemical energy stored within reactants (fuel and oxidant) into electrical energy.
This conversion happens through electrochemical reactions, generating electricity without involving combustion.
The process can be summarized as:
- Chemical Energy → Electric Energy
Options involving solar energy or mechanical energy are incorrect as they do not represent the direct conversion process occurring in a standard fuel cell.
Therefore, a fuel cell directly converts chemical energy into electric energy.
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: - Given below are two statements one is labelled as Assertion (A) and the other is labelled as Reason (R).
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: - 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 :
