Electricity and Magnetism Answers

Equal charges of 3x10^-9 are situated at the three corners of a square of side 5.20 m. Find the potential at the unoccupied corner.

An electron of mass 9.1×10(-31)kg enters a 1.7T magnetic field at right angle to the field .if the initial energy of the electron is 4.3MeV, calculate the radius of rotation of the electron. Calculate also the centripetal force on the electron and the frequency of circulation

A metal disc of diameter 20cm rotate at a constant speed of 600 revolution per minutes about an axis through the centre and perpendicular to it's plane in a uniform magnetic field of value 5×10(-3)T established parallel to the axis of rotation. Calculate the EMF in bolts between the centre and the rim of the disc. Show clearly on a diagram the direction of the magnetic field and the EMF induced

a magnetic field of strength 0.3T is directed perpendicular to a plane circular loop of wire at radius 25cm find the magnetic flux through the area enclosed by the loop

Determine the charge on each set of particles. 1.6 x 1019 protons = C

Spheres A, B, and C have charges +8 C, +12 C, and -5 C, respectively. Spheres A and B touched each other and then separated. Sphere A then touched sphere C and then separated

a. What is the total charge on the three spheres before and after touching each other?

b. What is the final charge on each sphere assuming they are identical?

c. What is the final charge on each sphere assuming that rA = rB = 2rC?

Electric Field:

You are helping to design a new electron microscope to investigate the

structure of the HIV virus. A new device to posit

ion the electron beam consists of a charged

circle of conductor. This circle is divided into two half circles separated by a thin insulator

so that half of the circle can be charged positively and half can be charged negatively. The

electron beam will go

through the center of the circle. To complete the design your job is to

calculate the electric field in the center of the circle as a function of the amount of positive

charge on the half circle, the amount of negative charge on the half circle, and the

radius of

the circle.

a rectangular loop is placed in a non-uniform magnetic field that is perpendicular and directed into the page. magnitude of b is 4t^2 x^2 (t) and w=4m and h=3m.find the induced emf around the loop at t=20 sec

You are skateboarding to school and realize that you are late. If you double your pace, by what factor would your mechanical kinetic energy increase?

A rectangular loop is placed in a non uniform magnetic field that is perpendicular and directed into the page. The magnitude of B is 4t²x²(T), W=4m and H=3m. Find €ind around the loop at t=20s