Question

A battery of 10 V and internal resistance $0.5\Omega$ is connected across a variable resistance R. The value of R for which the power delivered in its maximum state, is equal to :-

• A. $0.5\Omega$
• B. $1\Omega$
• C. $1.5\Omega$
• D. $2.0\Omega$

Answer 1

Answer: (A)

$0.5\Omega$

According to maximum power theorem, the maximum power will be delivered when external (load) resistance R is equal to internal resistance r, i.e. $R=r=0.5\Omega$