As a parallel-plate capacitor with circular plates 28 cm in diameter is being charged, the current density of the displacement current in the region between the plates is uniform and has a magnitude of 20 a/m2.(a)calculate the magnitudebof the magnetic field at a distancer= 69 mm from the axis of symmetry of this region.(b)calculatede/dtin this region.

magnetic field = 8.67 × T

dE/dt = 2.25× V/ms

Explanation:

given data

diameter = 28 cm

current = 20 A/m²

r= 69 mm = 69 ×  m

to find out

magnetic field and dE/dt

solution

we will apply here magnetic field formula that is

magnetic field = μ I / 2πr    .............1

put here all value

magnetic field = μ (Jπr²) / 2πr

magnetic field = 4π × (20) ( 69 ×) / 2

magnetic field = 8.67 × T

and dE/dt is calculated by current  that is

current I = ∈A dE/dt

so

dE/dt = I / ∈A      ....................2

that is dE/dt = J / ∈

dE/dt = 20 / 8.85 ×

dE/dt = 2.25× V/ms

i would think it's food chain

1/0.14nm = 10^10/1.4 a lot