JEE Mains · Physics · STD 12 - 3. current electricity
A \(10\,V\) battery with internal resistance \(1\,\Omega \) and a \(15\,V\) battery with internal resistance \(0.6\,\Omega \) are connected in parallel to a voltmeter (see figure). The reading in the voltmeter will be close to ................ \(V\)
- A \(12.5\)
- B \(24.5\)
- C \(13.1\)
- D \(11.9\)
Answer & Solution
Correct Answer
(C) \(13.1\)
Step-by-step Solution
Detailed explanation
As the two cells oppose each other hence, the effective emf in closed circuit is \(15-10=5 \,\mathrm{V}\) and net resistance is \(1+\) \(0.6=1.6 \,\Omega\) (because in the closed circuit the internal resistance of two cells are in series. Current in the circuit,…
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