Question

In a meter bridge, the balancing length from the left
end (standard resistance of one ohm is in the right
gap) is found to be 20 cm. The value of the
unknown resistance is
(1) 0.8 A
(2) 0.5 A
(3) 0.40 A
(4) 0.25 A

Answer 1

Answer:

0.25 A

By using equation,

Unknown resistance =R×l÷100-l

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