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  • A cell of emf (E) and internal resistance r is connected across a variable external resistance R. The graph of terminal potential difference V as a function of R is – Option: 1 <img alt="" src="https://cdn.entrance360.com/

A cell of emf (E) and internal resistance r is connected across a variable external resistance R. The graph of terminal potential difference V as a function of R is –
Option: 1
Option: 2
Option: 3
Option: 4

Answers (1)

\\V=IR=\frac{E}{R+r}R\\\\=\frac{E}{1+\frac{r}{R}}

\\R=0, \ V=0\\R=\infty\ V=E

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