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The emf of a cell is found to be 6V when measured by potentiometer. Now a resistance of 20Ω is connected across its terminal and potential difference across its terminals is found to be 5V by the same potentiometer and 4.8 V by a voltmeter. 45. The internal resistance of the cell is : (A) 0.5Ω (B) 1 Ω (C) 2.5Ω (D) 4Ω 46. The resistance of the voltmeter is : (A) 40Ω (B) 80Ω (C) 100Ω (D) 120Ω

The emf of a cell is found to be 6V when measured by potentiometer. Now a resistance of 20Ω is connected across
its terminal and potential difference across its terminals is found to be 5V by the same potentiometer and 4.8 V by a
voltmeter.
45. The internal resistance of the cell is :
(A) 0.5Ω (B) 1 Ω (C) 2.5Ω (D) 4Ω
46. The resistance of the voltmeter is :
(A) 40Ω (B) 80Ω (C) 100Ω (D) 120Ω

Grade:11

2 Answers

Manoj Patra
22 Points
5 years ago
4....80....
Manoj Patra
22 Points
5 years ago
4....80....

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