When two resistances X and Y are put in the left hand and right hand gaps in a Wheatstone meter bridge, the null point is at 60 cm. If X is shunted by a resistance equal to half of itself then find the shift in the null point.
Text Solution
Verified by ExpertsThe correct answer is:
A
Arrangement is shown in the figure.
… (i)
When X is shunted then resistance in the left gap becomes
… (ii)
Now from equation (i) and (ii)
Shift 
.
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