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Q.

A coaxial cylindrical capacitor with inner radius 5mm, outer radius 6mm and length 50cm has dielectric for which  εr=6.7. An A.C voltage V=250sin(377t)V is applied across capacitor. If displacement current amplitude is  9.6310nA . The value of ‘n’ is

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answer is 5.

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Detailed Solution

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Id=ε0εrdEdt=ε0εr2πrlq2πε0εrrl=CdVdt=2πε0εrlln(ba)×250×377cos377t

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