MP Board · Class 12 · Physics · Current ElectricityPotentiometer is preferred over a voltmeter for measuring EMF of a cell because:
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Total Attempts: 1
Accuracy Rate: 100%
Step-by-Step Solution
A potentiometer draws no current from the cell at the null point, thereby measuring the true EMF without internal resistance drop.
Detailed Options Breakdown
Option : It draws current from the cell
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Current Electricity.
Option 1: It draws no current from the cell at balance point (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 2: It is portable and cheap
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Current Electricity.
Option 3: It has low resistance
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Current Electricity.
💡 Study Guide: This question tests core syllabus concepts from Current Electricity. For formulas, key summaries, and mock exam reference guides, read the full Current Electricity Revision Notes.