Electricity and Magnetism Answers

ten electrons have been removed from each atom to form ions. find the electrostatic force between two such ions when separated by a distance of 4 angstrom in a medium of dielectric constant 4.

what is meant by radial field ?

An armature coil consists of 20 turns of wire, each of area A = 0.09m2 and total resistance 15.0 . It rotates in a megnetic field of 0.5T at a constant frequency of 150/3.14. Calculate the value of (i) maximum (ii) average induced emf produced in the coil 2

A proton, traveling with a velocity of 4.6 × 106 m/s due east, experiences a magnetic force that has a maximum magnitude of 5.8 × 10-14 N and direction of due south. What are the magnitude and direction of the magnetic field causing the force?

D1,D2 and D3 are three prallel conducting wires traversed respectively by the currents I1= 5 A, I2= 10 A and I3=5 A in the directions indicated I1, I2 upward. I3 downward. The distance between I1 and I2 is 10 cm. The distance between I2 and I3 is 20 cm. Find the electromagnetic force acting on a unit length of each wire.

Hi, I would like to ask how deep a 810 nm diode laser (commonly used for cosmetic and medical applications) penetrate into living human skin? How does the penetration depth depend on the energy (or fluence) of the laser and the diameter of the beam? Is it possible to determine a maximum penetration depth of a 810 nm diode laser? Thank you very much!

(a) What is the wavelength of 90.0 MHz radio waves used in an MRI unit?

(b) If the frequencies are swept over a 2.00% range centered on a 90.0 MHz, what is the range of wavelengths broadcast?

Electromagnetic radiation having a 14.0 mu wavelength is classified as infrared radiation. What is it's frequency?

An electric charge is uniformly distributed with volume density
ρ = 10−8 C/m3 between two infinite parallel plates which are d
= 2 cm apart. Calculate the electric flux density D(x) due to this
charge distribution and plot schematically its dependence on x.
Now imagine that a point charge q = 1.5 × 10−8 C is placed in the
median plane (the plane parallel to the two plates, midway between
them) of the charge distribution and determine what is the work
that the electrostatic force has to do in order to move q to a point
P, located outside the region where the charge is distributed, at a
distance h = 3 cm from the nearest plate.

an electron moves in a circular orbit with a uniform speed v.it produces a magnetic field B at the center of the circle .what is the radius of the circle proportional to?