The current I1 (in A) flowing through 1 Ω resistor in the following circuit is: (a) 0.4 (b) 0.25 (c) 0.2 (d) 0.5

Answer: (c). The 2 Ω (middle) is directly across the 1 V cell. Upper branch: (1 ∥ 1) + 2 = 0.5 + 2 = 2.5 Ω, so its current is 1/2.5 = 0.4 A. This splits equally in the two 1 Ω resistors: I₁ = 0.2 A So the answer is (c) 0.2.

The current I1 (in A) flowing through 1 Ω resistor in the following… | JEE Main 2020 (7 Jan, Shift 1)

Q142JEE Main 2020 · 7 JAN · SHIFT 1Medium

Kirchhoff's Laws & Measuring Instruments

The current I1 (in A) flowing through 1 $\Omega$ resistor in the following circuit is:

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Answer: (c)

The $2\ \Omega$ (middle) is directly across the $1$ V cell.
Upper branch: $(1 \parallel 1) + 2 = 0.5 + 2 = 2.5\ \Omega$ , so its current is $\frac{1}{2.5} = 0.4$ A.
This splits equally in the two $1\ \Omega$ resistors: $I_1 = 0.2$ A
So the answer is (c) 0.2.

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Kirchhoff's Laws & Measuring Instruments question from JEE Main 2020 (7 Jan, Shift 1)

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