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  4. In the given circuit diagram, if ideal ammeter is connected between points A and B, its reading is 5 A. if ammeter of resistance 3 Ω is connected between A and B, its reading is 3 A. Reading of ideal voltmeter is 90 / n volt, if it is connected between A and B. Find the value of n.

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Q. In the given circuit diagram, if ideal ammeter is connected between points $A$ and $B$, its reading is $5 \,A$. if ammeter of resistance $3 \,\Omega$ is connected between $A$ and $B$, its reading is $3\, A$. Reading of ideal voltmeter is $90 / n$ volt, if it is connected between $A$ and $B$. Find the value of $n$.Physics Question Image

Current Electricity

Solution:

Correct answer is '4'