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

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18 volt

30 volt

14 volt

15 volt

answer is C.

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Detailed Solution

Reading of voltmeter = E1r1+E2r21r1+1r2=E1r2+E2r1r1+r2=14 volt

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