Physics-
General
Easy
Question
A Wheatstone's bridge is balanced with a resistance of 625 
in the third arm, where P, Q and S are in the 1st, 2nd and 4th arm respectively. If P and Q are interchanged, the resistance in the third arm has to be increased by 51 to secure balance. The unknown resistance in the fourth arm is
- 625
- 650
- 676
- 600
The correct answer is: 650
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