(a)
(b) 5 A
Solution:
As per the question:
Radius of the circular plate, R = 9 cm = 0.09 m
Distance, d = 2.0 mm =
At , current, I = 5 A
Now,
Area, A =
We know that the capacitance of the parallel plate capacitor, C =
Also,
Also,
Now,
(a) The rate of change of electric field:
where
(b) To calculate the displacement current:
where
= Rate of change of flux
moving a magnet into a coil of wire in a closed circuit
Explanation;An electromagnet is a type of magnet that runs on electricity. It is created by introducing a magnetic material such as iron in a coil of wire in a closed circuit. The strength of the electromagnet can be easily changed by changing the amount of electric current flowing in the closed circuit. This is different from the case of a permanent magnet whose strength is constant. Poles of an electromagnet may be reversed by changing the direction of electric current.