in a potentiometer the balancing with a cell is at length of 220 cm .On shunting the cell wi6a resistance of 3 balance length becomes 130 cm . what is internal resistance of this cell
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Answer:
answer is 2.08 ohm
Explanation:
l1 = 220 cm
l2 = 130 cm
R = 3 ohm
r = (l1 - l2/l2) R
r =( 90/ 130 ) 3
270/130
= 2.08ohm
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