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An unknown resistance  is connected in series with a resistance of 10 . This combination is connected to one gap of meter bridge while a resistance is connected in the other gap. The balance point is at 50 cm, Now, when the 10  resistance is removed the balance point shifts 40cm. The value of (in ohm) is


Question ID - 151361 :-

An unknown resistance  is connected in series with a resistance of 10 . This combination is connected to one gap of meter bridge while a resistance is connected in the other gap. The balance point is at 50 cm, Now, when the 10  resistance is removed the balance point shifts 40cm. The value of (in ohm) is

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Answer Key : (20) -

The balance condition of a meter bridge experiment

Here,

Ist case  

IInd case

So, Eqs. (i) and (ii) give



Next Question :

A wire has a resistance of 6 . It is cut into two parts and both half values are connected in parallel. The new resistance is

a)

3

b)

6

c)

12

d)

1.5


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