Q5 (i) Figure 2 given below shows a part of Wheatstone bridge circuit. With the help of Kirchhoff’s loop rule, calculate the current flowing through the 4Ω resistor.



OR

(ii) In an experiment conducted to determine the internal resistance of a cell, its emf is balanced against a p.d. across 110cm of the potentiometer wire. The balancing length becomes 100cm when the cell is shunted by a resistance of 10Ω. Calculate the internal resistance of the cell.

Solution

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