AP EAMCET · PHYSICS · Current Electricity
In a potentiometer, a wire of length having resistance is used. A battery of and a resistor of are connected in series to the wire. If an unknown battery of emf balances the potentiometer at , then the value of is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
In the case of potentiometer null point is obtained when the current flowing from the battery E1 should be equal to current drawn from the battery E2, ⇒i1=i2⇒E1Rwire+R=E2RBalance here, E1=5 V,…
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