current electricity

a battrry of emf 10V and internal resistance 0.5 ohms is connected across a variable resistance R. What is the value of R for which the power delivered in it is maximum?

2 Answers

1163
Akash Anand ·

@Sohini: If you dont know the concept of Maximum Power Transfer Theorem, then simply find the expression for power and apply Maxima-Minima. You will get this.

146
Amartya Kumar Mistry ·

This is simple maximum power transfer theorem which says if internal resistance is equal to load resistance then the power transformed will be max.so the answer will be R=0.5

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