Electricity and Magnetism Answers

A uniform current J₁= J₀coswte^{^}_y flows on the surface z =0. and a second sheet of current J₂= J₀coswte^{^}y flows in the surface z= pi*c/2w .a) Find the Maxwell eqn fitting boundary condition E =0, B =0, for z ,0

b)Calculate the flux of pyontying vector and compare to the average power per unit area that must be supplied to drive these currents.

Find the electric field ⃗ (E)due to a disk above ‘z’ height from its centre which has a 

constant surface charge σ. Given that disk’s radius is ‘a’.

4.0 x 105 neutrons = _________________ C

what ia the net direction of net coulomb force on Q3 from + x axis? (answer in degree).

Q2 is 50cm to the right from Q1 and Q3 is 40cm below Q1.

Q1 = 35 x 10-6 C

Q2= 65 x 10-6 C

Q3 = 80 x 10-6 C

the net force on unknown charge is zero. what os distance between Q1 and Q2.

Distance between Q and Q1 is 50 cm, Q1 = 30×10-6 C and Q2 = 60×10-6 C.

One charge of 2.0C is 1.5m away from a -3.0e charge. Determine the force they exert from each other.

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