Sea water at frequency `v=4xx10^8Hz` has permitivity `epsilon~~80epsilon_0`, pemeability `mu=mu_0` and resistivity `rho=0.25Omega-m`. Imagine a parallel plate capacitor immersed in sea water and driven by an alternating voltage source `V(t)=V_0sin(2pivt)`. What fraction of the conduction density is the dispalcement current density?

A parallel plate capacitor (Fig. 8.7) made of circular plates each of radius R = 6.0 cm has a capacitance C = 100 pF. The capacitor is connected to a 230 V ac supply with a (angular) frequency of 300 rad s^-1 . Is the conduction current equal to the displacement current? :

A parallel plate cpacitor has plates of area 0.32 m^2 ,which are separated by a distance of 5mm.The capacitor is raised to a potential of 1,200 V.Estimate the average value of displacement current,when it is discharged for 1 mus .

A capacitor of capacitance 100mu and a coil of resistance 50Omega and inductance 0:5 henry are connected in series with a source of voltage 110V and frequency 50 hertz. Calculate the current in the circuit.

A parallel plate capacitor (Fig. 8.7) made of circular plates each of radius R = 6.0 cm has a capacitance C = 100 pF. The capacitor is connected to a 230 V ac supply with a (angular) frequency of 300 rad s^-1 . What is the rms value of the conduction current? :

Two parallel plate capacitors A and B have the same separation d= 8.85xx10^-4m between the plates. The plate area of A and B are 0.04m^2 and 0.02m^2 respectively. A slab of dielectric constant (relative permittivity) K=9 has dimensions such that it can exactly fill the space between the plates of capacitor B. A is then charged to a potential difference of 110V. Calculate the capacitance of A and the energy stored in it.