Question 672: Current Electricity

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

Accepted Answer

From KirchhoffÃ¢ÂÂs law, I ÃÂ 2 + I ÃÂ 1 = 18 Ã¢ÂÂ 12
Current in the circuit,
$$I = {V \over R} = {6 \over 2} = 2A$$
Voltage drop across  $$2\Omega $$,
V
1
= 2 ÃÂ 2 = 4 V
Voltmeter reading = 18 Ã¢ÂÂ 4 = 14 V.

Answer

30 volt

Answer

18 volt

Answer

15 volt

Answer

14 volt

Current Electricity

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

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