Physics-
General
Easy
Question
The figure shows a network of five resistances and two batteries The current through the 30V battery is
- 3A
- 1A
- 2A
- none
The correct answer is: 3A
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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
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physics-General
