question_answer

A parallel plate capacitor of area 60 \[{{\operatorname{cm}}^{2}}\] and separation 3 mm is charged  initially to \[90\mu \operatorname{C}.\] If the medium between the plate gets slightly conducting and the plate loses the charge initially at the rate of \[2.5\times {{10}^{-8}}\operatorname{C}/s,\] then what is the magnetic field between the plates? [JEE ONLINE 23-04-2013]

A)             \[2.5\times {{10}^{-8}}\operatorname{T}\]

B) \[2.0\times {{10}^{-7}}\operatorname{T}\]

C)             \[1.63\times {{10}^{-11}}\operatorname{T}\]

D) Zero