JEE Main 2015 · 11 Apr · Shift 1 · Physics Q29

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PhysicsSingle correct+4 / -1Question 29 of 90

A 2V battery is connected across AB as shown in the figure. The value of the current supplied by the battery when in one case battery's positive terminal is connected to A and in other case when positive terminal of battery is connected to B will respectively be :

Two parallel branches between the left and right wires: the upper has diode D1 (pointing right) and 5 Ω; the lower has diode D2 (pointing left) and 10 Ω. Terminals A (left) and B (right) are at the bottom.

0.2 A and 0.1 A

0.4 A and 0.2 A

0.1 A and 0.2 A

0.2 A and 0.4 A

Answer and worked solution

Official answer: B

With A positive, current flows through D1 (forward biased) and 5 Ω: $\frac25=0.4$ A. With B positive, it flows through D2 and 10 Ω: $\frac2{10}=0.2$ A.

Topics:Semiconductors and p-n junction

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JEE Main 2015 · 11 Apr · Shift 1, Physics question 29