Q26.A cell, shunted by a 8 Ω resistance, is balanced across a potentiometer wire of length 3 m . The balancing length is 2 m when the cell is shunted by 4 Ω resistance. The value of internal resistance of the cell will be _____ Ω.
What This Question Tests
This question involves using the potentiometer principle to find the internal resistance of a cell by comparing balancing lengths for different shunting resistances.
Concepts Tested
Formulas Used
E = I(R + r)
V = IR
E ∝ l
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📋 Question Details
- Chapter
- Current Electricity
- Topic
- Potentiometer and internal resistance
- Year
- 2022
- Shift
- 27 Jun Shift 1
- Q Number
- Q26
- Type
- Numerical
- NCERT Ref
- Class 12 Physics Ch 3: Current Electricity
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