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PhysicsSingle correct+4 / -1Question 38 of 75

JEE Main 2026 · 5 Apr · Shift 1, Physics question 38

Refer to the figure given below, current between terminals AA and BB is ________ A.

Four parallel branches between a left rail (A at its bottom) and a right rail (B at its bottom). Each of the top three branches has three 5 V cells (+ on the left) alternating with three 3 Ω resistors; the bottom branch, directly from A to B, has three 3 Ω resistors only.
Choose one option
Answer and worked solution

Official answer: B

Each upper branch is three 5 V cells and three 3 Ω resistors in series: 15 V with 9 Ω.

Three in parallel. Identical branches combine to 15 V with 9/3=39/3=3 Ω.

Current in the A-B branch (9 Ω):
I=153+9=1.25 A.I=\frac{15}{3+9}=1.25\text{ A}.

(B)