IIT-JEE 2011 · Paper 2 · Physics Q35

PhysicsInteger+4Question 35 of 60

Two batteries of different emfs and different internal resistances are connected as shown. The voltage across AB in volts is

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Answer and worked solution

Official answer: 5

Two cells in parallel with like terminals together (positive towards A). Loop current $I=\dfrac{6-3}{1+2}=1$ A.

Voltage. $V_{AB}=6-1\times1=3+1\times2=5$ V. Equivalently $V=\dfrac{6/1+3/2}{1/1+1/2}=5$ V.

Answer: 5

IIT-JEE 2011 · Paper 2, Physics question 35