# A 10 V battery with internal resistance and a 15V battery with internal resistance are connected in parallel to a voltmeter (see figure). The reading in the voltmeter will be close to : Option 1) 11.9 V Option 2) 12.5 V Option 3) 13.1 V Option 4) 24.5 V

Answers (2)

As we discussed in

In closed loop -

$-i_{1}}R_{1} + i_{2}}R_{2} -E_{1}-i_{3}}R_{3}+E_{2}+E_{3}-i_{4}}R_{4}=0$

- wherein

Current in the circuit

$I=\frac{5}{1.6}=\frac{50}{16}=\frac{25}{8}A$

Reading of the voltmeter

$V=15-\frac{25}{8}\times 0.6$

$V=15-\frac{15}{8}=13.1V$

Option 1)

11.9 V

The option is incorrect

Option 2)

12.5 V

The option is incorrect

Option 3)

13.1 V

The option is correct

Option 4)

24.5 V

The option is incorrect

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