NEET Questions Solved


In the figure given the value of X resistance will be, when the p.d. between B and D is zero 

(1) 4 ohm

(2) 6 ohm

(3) 8 ohm

(4) 9 ohm

(3) Potential difference between B and D is zero, it means Wheatstone bridge is in balanced condition

So PQ=RS

213+8X(8+X)=186

X=8Ω

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