Due to the electric polarisation of dielectric, the capacitance of a parallel plate capacitor
Correct answer: A. Increases.
- A. Increases.
- B. Decreases.
- C. Becomes zero.
- D. Remains the same.
Explanation
The correct answer is that the capacitance of a parallel plate capacitor increases due to the electric polarisation of the dielectric. When a dielectric material is introduced between the plates of a capacitor, it becomes polarized, creating an opposing electric field that reduces the net electric field within the capacitor. This allows the capacitor to hold more charge at the same voltage, thus increasing its capacitance. Option B is incorrect because the capacitance does not decrease; it increases. Option C is incorrect because the capacitance cannot be zero unless the plates are short-circuited or destroyed, which is not the case here. Option D is incorrect because the capacitance does change; it increases, rather than remaining the same.
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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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