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Standard XII

Physics

Simple Circuit

Two resistanc...

Question

Two resistances $R_{1}$ and $R_{2}$ are joined as shown in the figure to two batteries of e.m.f. $E_{1}$ and $E_{2}$ . If $E_{2}$ is short-circuited, the current through $R_{1}$ is

E₁/R₁

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E₂/R₁

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E₂/R₂

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E₁/(R₂ + R₁)

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Solution

The correct option is A E₁/R₁
After short circuiting, $R_{2}$ becomes meaningless.

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Two resistances $R_{1}$ and $R_{2}$ are joined as shown in the figure to two batteries of e.m.f. $E_{1}$ and $E_{2}$ . If $E_{2}$ is short-circuited, the current through $R_{1}$ is

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