NEETPhysics-Electromagnetism

NEET Physics Circuits MCQ Question

Type: MCQ-conceptual-Medium-Class 12

Two batteries of emf ε1\varepsilon_1 and ε2\varepsilon_2 (ε2>ε1\varepsilon_2 > \varepsilon_1) and internal resistances r1r_1 and r2r_2 respectively are connected in parallel as shown in figure.

Question diagram
A

The equivalent emf εeq\varepsilon_{eq} of the two cells is between ε1\varepsilon_1 and ε2\varepsilon_2, i.e., ε1<εeq<ε2\varepsilon_1 < \varepsilon_{eq} < \varepsilon_2.

B

The equivalent emf εeq\varepsilon_{eq} is equal to ε1\varepsilon_1.

C

The equivalent emf εeq\varepsilon_{eq} is equal to ε2\varepsilon_2.

D

The equivalent emf εeq\varepsilon_{eq} is greater than ε2\varepsilon_2.

Correct Answer

Option A

Detailed Explanation

When batteries are connected in parallel, the equivalent emf is a weighted average of the individual emfs, falling between the two values.

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