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Asked by Deepak 4th October 2018, 7:44 PM
Magnetic field B inside capacitor due to displacement current Id is given by, .....................(1)
where μ0 is permeability of free space, ε0 is permitivity of free space, φ is flux of electric field.

from eqn.(1), we can write that,
where r is the radius of capacitor plate.
Flux φ = Electric field × area of capacitor plate = ...........................(3)
flux φ(t)  = .......................................(4)
let us differentiate eqn.(4) and substitute in eqn.(2) to get B
...........................................(5)
In eqn.(5), is the capacitance.  By substituting the capacitance value 10μF,   r = 10 cm, μ0 = 4π×10-7  and
considering maximum value of cosine function is one, we get the maximum value of B = 4√2 π × 10-6 T
Answered by Expert 5th October 2018, 4:38 AM
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