A null point is found at 200 cm in potentiometer when cell in secondary circuit is shunted by 5 Ω. When a resistance of 15 Ω is used for shunting, null point moves to 300 cm. The internal resistance of the cell is _ _ _ _ _ _ Ω.

Current Electricity: JEE Main 2023 Physics question

JEE Main 2023 · 29 Jan, Evening shift · Q63

JEE Main 202329 Jan, Evening shiftPhysicsMediumCurrent Electricity150× since 2002

A null point is found at 200 cm in potentiometer when cell in secondary circuit is shunted by 5

\Omega

. When a resistance of 15

\Omega

is used for shunting, null point moves to 300 cm. The internal resistance of the cell is ___________

\Omega

Your answerType your answer. Integers and decimals are accepted.

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