A parallel plate capacitor has a capacitance C. If the distance between the plates and the area between plates both halved. Now the capacitance will be?
Correct answer: D. C
- A. 0.5C
- B. 0.25C
- C. 4C
- D. C
Explanation
C= AEo/d d'=1/2d A=1/2A C=1/2AEo/1/2d C=1/2AEo/1/2d C-AEo/d Unchanged
This question appeared on the HEC Phase I 2017 paper, which you can sit online with every answer explained.
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About Capacitors
Capacitors store electric charge and energy in an electric field between conductors. Work includes capacitance, the relation Q = CV, dielectric materials, charging and discharging, energy formulas, and combinations of capacitors in series and parallel. Electric potential difference is needed to understand why charge and stored energy change.
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