When the separation between the plates of an air parallel-plate capaci…

Question

When the separation between the plates of an air parallel-plate capacitor is doubled (keeping plate area constant), the capacitance

Accepted Answer

D. {'text': 'halves', 'label': 'D'}

1. C = ε₀ A / d.
2. Doubling d gives C' = ε₀ A / (2d) = C/2.
3. So capacitance halves; the field also halves at fixed Q.
_Source: NCERT Class 12 Physics Part I, Ch 2 §2.12_

Answer

{'text': 'remains unchanged', 'label': 'A'}

Answer

{'text': 'becomes one-fourth', 'label': 'B'}

Answer

{'text': 'doubles', 'label': 'C'}