Aparallel-plate capacitor in air has circular plates of radius 3.0 cm separated by 1.1 mm. charge is flowing onto the upper plate and off the lower plate at a rate of 5 a. find the time rate of change of the electric field between the plates.

2 x 10^14 N/Cs

Explanation:

radius, r = 3 cm

Area , A = 3.14 x 3 x 3 = 28.26 cm^2 = 28.26 x 10^-4 m^2

d = 1.1 mm = 1.1 x 10^-3 m

i = 5 A

Let time be t and electric field strength is E.

Charge, q = i x t = 5 t

q = C V

q = C x E x d

E/t = 2 x 10^14 N/Cs

electrical power

the maxium height is 34m/s