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Simple Circuit

Equivalent re...

Question

Equivalent resistance of the system and potential difference across the external resistance in the figure.

r, o

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r, E

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o, E

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r, \frac{E R}{R + r}

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Solution

The correct option is A $r, o$
The resistance R is fused by wire AB. $\Rightarrow$ Equivalent resistance of the circuit = r
since, resistance R is fused, so there is no any current in that resistance R, this implies that there is same voltage across the both ends of resistance R. So voltage difference = 0

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Equivalent resistance of the system and potential difference across the external resistance in the figure.

The correct option is A r,oThe resistance R is fused by wire AB.⇒ Equivalent resistance of the circuit = rsince, resistance R is fused, so there is no any current in that resistance R, this implies that there is same voltage across the both ends of resistance R. So voltage difference = 0