Questions
In a meter bridge circuit as shown, when one more resistance of 100 Ω is connected is parallel with unknown resistance x, then ratio become 2. If l1 is balance length of the uniform wire A B, then the value of x must be:
detailed solution
Correct option is B
∵wheat stone bridge is in balanced conditionSo 100ℓ1=100x100+xℓ2∵ℓ1ℓ2=2 ⇒x=100ΩTalk to our academic expert!
Similar Questions
Two resistances are connected in two gaps of a metre bridge. The balance point is 20 cm from the zero end. A resistance of 15 ohm is connected in series with the smaller of the two. The null point shifts to 40 cm. The value of the smaller resistance in ohm is
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