A1200-nf capacitor with circular parallel plates 2.0 cm in diameter is accumulating charge at the rate of 35 mc/s at some instant in time. (a) what will be the magnitude of the induced magnetic field 10.0 cm radially outward from the center of the plates?

Explanation:

As we know that charge on the plates of capacitor is changing at rate given as

now this rate of charging the plates will give the displacement current in the region between the plates

Now by Ampere's law we can say

now we have

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.