Electricity and Magnetism Answers

The polarisability of a given material is 1.0×10-40 C2
mN−1
. Determine its dielectric
constant if the number of molecules in 1 m3
volume of the material is 5.0×1025.

SUsing Gauss’ Theorem calculate the flux of the vector field F =
xi ˆ+yj^+z kˆ through
the surface of a cylinder of radius A and height H, which has its axis along the z-axis
and the base of the cylinder is on the xy-plane.

Two 2.00-µC point charges are located on the x axis. One is at x = 1.00 m, and the other is at x = -1.00 m. (a) Determine the electric field on the y axis at y = 0.500 m. (b) Calculate the electric force on a -3.00-µC charge placed on the y axis at y = 0.500 m

Suppose the direction of current passing through two straight wires is same.would the wires attract or repel eachother?

The parallel plates of an air capacitor are seperated by 2.25 mm. Each plate carries a charge of 6.5 nC. The magnitude of the electric field of the plates is 4.75x10⁵ V/m. Find the a) potential difference between the plates, b) capacitance, and c) area of a plate.

Metallic iron contains approximately 10^(29) atoms per cubic meter.The magnetic moment of each iron atom is 1.8×10^(-23) Am(-1).If all the dipoles were perfectly aligned what would be the magnetisation M and the magnetic moment of a bar 10 cm long and 1 cm^(2) in cross-section?

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

A rectangular loop of wire that can rotate about an axis through its center is placed between the poles of a magnet in a magnetic field with a strength of 0.357 T (with the magnetic field parallel to the plane of the loop). The length of the loop L is 15.5 cm and its width w is 10.0 cm. What emf is developed in the loop if the loop is rotated form this position, in 1.00 ms, to a position where the plane of the loop makes an angle of 54.5 degrees with the magnetic field.

Four particles carrying charges +2q,-2q,+4q and -4q (with q=1.0 nC) are kept at the vectors of a square of side 6.0 cm.Determine the net electric field due to these charged particles at the centre of square.What is the electrostatic force on a particle carrying positive charge of 1.0 nC placed at the centre of square? Please explain in detail.

Four particles carrying charges + 2q, − 2q, + 4q and − 4q (with q = 1.0 nC) are kept at
the vertices of a square of side 6.0 cm. Determine the net electric field due to these
charged particles at the centre of the square. What is the electrostatic force on a
particle carrying positive charge of 1.0 nC placed at the centre of the square?