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
- The energy that a windmill can gather is proportional to the
- Which of the following biofuels is produced from acidification and distillation of woody crops ?
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 : - Given below are two statements. One labelled as Assertion (A) and the other labelled as Reason (R) :
Assertion (A) : The rotor blades of wind - turbine execute rotational motion when moving air impinges on them.
Reason (R) : The momentum of the moving air is transferred to the moving blades.
Choose the correct answer :
