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QAIPM-2001-Ph-2937: NEET 2001 Physics - Class 12 AIPM-2001-Ph-2937 Solution: The resistance of each arm of the Wheatstone's bridge is 10…
The resistance of each arm of the Wheatstone's bridge is 10 ohm. A resistance of 10 ohm is connected in series with a galvanometer then the equivalent resistance across the battery will be
Multiple Choice Options
- A 10 ohm
- B 15 ohm
- C 20 ohm
- D 40 ohm
Step-by-Step Verified Solution
Here, P = Q = S = R = 10 �
since P Q = S R = 1 , so it is balanced Wheatstone bridge and no current pass through galvanometer.
_ Equivalent resistance is given by
R = ( 10 + 10 ) ( 10 + 10 ) ( 10 + 10 ) + ( 10 + 10 )
= 20 _ 20 40 = 10 �