Q. Two batteries, one of emf $18\ volt$ and internal resistance $2\Omega$ and the other of emf $12\ volt$ and internal resistance $1\Omega,$ are connected as shown. The voltmeter $V$ will record a reading of

A) $15\ volt$
B) $30\ volt$
C) $14\ volt$
D) $18\ volt$
Explanation

(c) Reading of voltmeter
$= E_{eq} = \frac{E_{1}r_{2} + E_{2}r_{1}}{r_{1} + r_{2}} = \frac{18 \times 1 + 12 \times 2}{1 + 2} = 14V$

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.