Physics Current Electricity MDCAT 2009
PMDC Verified Question 109 of 112
The energy supplied by the cell to the charge carriers is derived from the conversion of:
A
Heat energy into Electrical energy
B
Solar energy into Electrical energy
C
Chemical energy into Electrical energy
D
Mechanical energy into Electrical energy
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Chemical energy into Electrical energy
Concept:

An electrochemical cell generates electromotive force (EMF) through internal reactions.

Solution:

  • Inside a standard battery or cell, redox chemical reactions occur.


  • The energy released by these chemical reactions is converted directly into electrical energy, giving potential to the charge carriers.


Why other options are incorrect:

  • Opt A: Thermocouples do this, not cells.


  • Opt B: Solar panels/photovoltaic cells do this, not standard electrochemical cells.


  • Opt D: Generators/dynamos convert mechanical energy, not cells.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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