In the circuit shown, if a conducting wire is connected between points A and B, the current in this wire will (a) flow from B to A (b) flow from A to B (c) flow in the direction which will be decided by the value of V be zero. (d) be zero

Answer: (a). Left end is at the + terminal (potential V), right end at 0. Without the wire: VA = V - 4/8V = 0.5V, VB = V - 1/4V = 0.75V. VB > VA, so current flows from B to A when they are joined. (With the wire: common node at 15V/22, current A to B = (7V/22 - 15V/22)/(4) < 0, confirming B to A.) So the answer is (a) flow from B to A.

In the circuit shown, if a conducting wire is connected between… | NEET 2006 (AIPMT)

Q195NEET 2006 · AIPMTMedium

Kirchhoff's Laws & Measuring Instruments

In the circuit shown, if a conducting wire is connected between points A and B, the current in this wire will

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Answer: (a)

Left end is at the + terminal (potential $V$ ), right end at 0.
Without the wire: $V_A = V - \frac{4}{8}V = 0.5V$ , $V_B = V - \frac{1}{4}V = 0.75V$ .
$V_B > V_A$ , so current flows from B to A when they are joined.
(With the wire: common node at $\frac{15V}{22}$ , current A to B $= \frac{7V/22 - 15V/22}{4} < 0$ , confirming B to A.)
So the answer is (a) flow from B to A.

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