COMEDK · Physics · 18. Capacitance
The potential difference between the points \(\mathrm{P}\) and \(\mathrm{Q}\) of the arrangement shown in figure is
- A \(-3.9\) V
- B \(-42\) V
- C 42 V
- D \(-9.3\) V
Answer & Solution
Correct Answer
(D) \(-9.3\) V
Step-by-step Solution
Detailed explanation
Both battery positive terminals face left, so they oppose each other. Net EMF \(= 28 - 14 = 14\) V (driven by 28V, counter-clockwise). Capacitors in series: \(C_{eq} = \dfrac{4 \times 8}{4+8} = \dfrac{32}{12} = \dfrac{8}{3}\ \mu F\) Charge:…
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