Current Electricity 2 Question 15

15. In the given circuit, it is observed that the current I is independent of the value of the resistance R6. Then, the resistance values must satisfy

(2001, 2M)

(a) R1R2R5=R3R4R6

(b) 1R5+1R6=1R1+R2+1R3+R4

(c) R1R4=R2R3

(d) R1R3=R2R4

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Solution:

  1. Current I can be independent of R6 only when R1,R2,R3,R4 and R6 form a balanced Wheatstone’s bridge.

Therefore, R1R2=R3R4 or R1R4=R2R3



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