Electricity and Magnetism Answers

In the expression F=k qq/r2 why only k is used why not any other constant'

What is the difference between magnetic flus (B ) and magnetising intensity (H)

Details on Working principles of generator and electric motor

Calculate the electric field at the center of a square 52.5cm on a side if one corner is occupied by -38.6*10^-6 coloumb charge and the other three are occupied by -27.0*10^-6 coloumb charges.

Explain why Magnetic deflection is preferred to electrostatic deflection in CRTs.

When a certain a.c supply is connected to a lamp, it lights with the same brightness as it does with a 12v d.c battery. The r.m.s value of the a.c supply is

The polarisability of a given material is 1.0×10^-40 C^2mN^−1. Determine its dielectric
constant if the number of molecules in 1 m^3 volume of the material is 5.0×10^25.

Using Maxwell’s equations in free space, derive the wave equation for the z-component of
the electric field vector.

A uniform plane wave of 10 kHz travelling in free space strikes a large block of a
material having ε = 9ε0, μ = 4μ0 and σ = 0 normal to the surface. If the incident
magnetic field vector is given by
B =10^− 3sin (ωt −βy) kˆ
tesla
Write the complete expressions for the incident, reflected, and transmitted field vectors.

Write the plane wave form for the z-component of the electric field vector of an electromagnetic wave of wavelength 10 cm and field strength 200 Vm^–1. The wave is propagating in the positive x-direction