Two batteries, one of emf 18 volts and internal resistance $2 \Omega$ and the other of emf 12 volts

Question

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

Professor PC Thomas Classes · Answer

(d) : Current in the circuit, $$ I=\frac{V}{R}=\frac{6}{3}=2 \mathrm{~A} $$ Voltage drop across $2 \Omega$, $$ V_{1}=2 	imes 2=4 \mathrm{~V} $$ Voltmeter reading $=18-4=14 \mathrm{~V}$\