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
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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 .
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