An external resistance R is connected to a battery of e.m.f. V and int – McqOptions

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1.	An external resistance R is connected to a battery of e.m.f. V and internal resistance r. The joule heat produced in resistor R is maximum when R is equal to [MP PET 2001]
A.	r
B.	\[\frac{r}{2}\]
C.	2r
D.	Infinitely large
Answer» B. \[\frac{r}{2}\]

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