Question 115 of 180
A parallel plate capacitor is made of two plates of length 1 , width and separated by distance . A dielectric slab (dielectric constant ) that fits exactly between the plates is held near the edge of the plates. It is pulled into the capacitor by a force where is the energy of the capacitor when dielectric is inside the capacitor up to distance (See figure). If the charge on the capacitor is Q then the force on the dielectric when it is near the edge is:
Show answer and solution
Answer: (C)
No Solution Available
%20that%20fits%20exactly%20between%20the%20plates%20is%20held%20near%20the%20edge%20of%20the%20plates.%20It%20is%20pulled%20into%20the%20capacitor%20by%20a%20force%20F%3D-%20U%20x%20where%20U%20is%20the%20energy%20of%20the%20capacitor%20when%20dielectric%20is%20inside%20the%20capacitor%20up%20to%20distance%20x%20(See%20figure).%20If%20the%20charge%20on%20the%20capacitor%20is%20Q%20then%20the%20force%20on%20the%20dielectric%20when%20it%20is%20near%20the%20edge%20is%3A%20%3Cimg%20src%3D%22%2Fpractice%2Fpyq%2Fcapacitance1121818.png%22%3E%0A(A)%20Q%5E2%20~d2%20wl%5E2%20o%20K%0A(B)%20Q%5E2%20~W2%20dl%5E2%200(~K-1)%0A(C)%20Q%5E2%20~d2%20wl%5E2%20o(K-1)%0A(D)%20Q%5E2%20w2%20dl%5E2%20o%20K){kind=link}