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Current Electricity question

2005 · Q173
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Current Electricity question

2005 · Q173

NEETPhysicsCurrent ElectricityMCQ+4 / −1
Two batteries, one of emf 18 volts and internal resistance 2 Ω\OmegaΩ and the other of emf 12 volts and internal resistance 1 Ω\OmegaΩ, are connected as shown. The voltmeter V will record a reading of

AIPMT 2005 Physics - Current Electricity Question 64 English
  1. A
    30 volt
  2. B
    18 volt
  3. C
    15 volt
  4. D
    14 volt
View written solutionFree

Correct answer: D

AIPMT 2005 Physics - Current Electricity Question 64 English Explanation

From Kirchhoff’s law, I × 2 + I × 1 = 18 – 12

Current in the circuit,

I=VR=62=2AI = {V \over R} = {6 \over 2} = 2AI=RV​=26​=2A

Voltage drop across 2Ω2\Omega 2Ω,

V1 = 2 × 2 = 4 V

Voltmeter reading = 18 – 4 = 14 V.

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