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Current Electricity question

2006 · Shift 0 · Q119
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Current Electricity question

2006 · Shift 0 · Q119

JEE MainPhysicsCurrent ElectricityMCQ+4 / −1
In a Wheatstone's bridge, three resistance P,QP, QP,Q and RRR connected in the three arms and the fourth arm is formed by two resistances S1{S_1}S1​ and S2{S_2}S2​ connected in parallel. The condition for the bridge to be balanced will be
  1. A
    PQ=2RS1+S2{P \over Q} = {{2R} \over {{S_1} + {S_2}}}QP​=S1​+S2​2R​
  2. B
    PQ=R(S1+S2)S1S2{P \over Q} = {{R\left( {{S_1} + {S_2}} \right)} \over {{S_1}{S_2}}}QP​=S1​S2​R(S1​+S2​)​
  3. C
    PQ=R(S1+S2)2S1S2{P \over Q} = {{R\left( {{S_1} + {S_2}} \right)} \over {2{S_1}{S_2}}}QP​=2S1​S2​R(S1​+S2​)​
  4. D
    PQ=RS1+S2{P \over Q} = {R \over {{S_1} + {S_2}}}QP​=S1​+S2​R​
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