Current Electricity - Result Question 41

43. Cell having an emf ε and internal resistance r is connected across a variable external resistance R. As the resistance R is increased, the plot of potential difference V across R is given by :

[2012M]

(c)

(d)

Show Answer

Answer:

Correct Answer: 43. (c)

Solution:

  1. (c) The current through the resistance R

I=(εR+r)

The potential difference across R

V=IR=(εR+r)R

Thus V increases as R increases upto certain limit, but it does not increase further.

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