A parallel plate capacitor has its length, width and separation doubled. It fringing effects are neglected, to keep the capacitance same, the dielectric constant must be
Options
A. halved
B. kept the same
C. doubled
D. made 4 times
Correct Answer
halved
Explanation
. When dimensions are changed, A become four times and d becomes twice.
Since ?0 is constant, ?r must be halved to keep C constant.
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