Question

In a meter bridge, two unknown resistance r and s, when connected in the two gaps, give a null point at 40 cm from one end.what is the ratio of r and s

Answer 1

Answer:

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Answer 2

Given :

Unknown resistors are r and s respectively .

Null point from one end = 40 cm  

To find :

The ratio of resistors r and s .

Solution :

r/s = null point from one end / (100 - null point from one end )

=> r/s = 40 / ( 100 - 40 )

=> r/s = 40 / 60

=> r/s = 2 / 3

The ratio of resistors r and s is 2 : 3 .