In the given circuit, the galvanometer G will show zero deflection if :
Correct answer: C. R1×R4= R2×R3
- A. R1 × R2 = R3 ×R4
- B. R1×R3= R2×R4
- C. R1×R4= R2×R3
- D. None of the above
Explanation
The given circuit resembles a Wheatstone bridge, which is a configuration used to measure unknown resistances or to create a balanced circuit condition. In a balanced Wheatstone bridge, the galvanometer GG shows zero deflection when the ratio of the two pairs of resistors is equal, i.e., R1/R2 = R3/R4 . Multiplying both sides gives: R1R4 = R2R3 .This is the condition for zero deflection in the galvanometer
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