JEE Main 2022 · 29 Jun · Shift 2 · Physics Q49

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PhysicsSingle correct+4 / -1Question 49 of 90

The combination of two identical cells, whether connected in series or parallel combination provides the same current through an external resistance of 2 $\Omega$ . The value of internal resistance of each cell is

\Omega

\Omega

\Omega

\Omega

Answer and worked solution

Official answer: A

Series $\dfrac{2E}{2+2r}$ equals parallel $\dfrac E{2+r/2}$ only when $r=R=2$ Ω.

(A)

Topics:EMF and internal resistance

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JEE Main 2022 · 29 Jun · Shift 2, Physics question 49