Field Theory Answers

Determine the electric potential energy of the system of Charges shown in figure below: (I)3c
(2)5c
(3)4c
(1)3 m
(2)4 m
(3)5 m

A)Using Biot-Savart Law,obtain an expression for the magnetic field along the axis of a current loop. B)In the Bohr model of hydrogen atom, the electron follows a circular orbit centred on the nucleus containing a proton. The motion of the electron along the circular orbit constitutes a current. Calculate the magnetic field produced by the orbiting electron at the site of the proton. C)A fuse in an electric circuit is designed to open the circuit like a switch when the current exceeds a preset value. If a fuse is made of material that melts when the current density reaches 400 A cm^2, what is the diameter of the wire needed to limit the current to 0.30 A?

A)Do the following fields satisfy all four Maxwell's equations? E(t) = E0 sin x sin t. B (Vector) = B(vector) 0 cos x cos t. B)In a cyclotron, the diameter of the pole faces is 100 cm and the magnetic field between the pole faces is 0.60 T.The cyclotron is used for accelerating protons. Calculate the kinetic energy of proton in eV and speed of the proton as it emerges from the cyclotron. Also determine the cyclotron frequency. C)Obtain a relation between the refractive index and polarisability of a dielectric material.

the electric potential difference between two points A and B IS 42v . what is the work done by an external agent in caring an charge of 5.0x10-5 from A to B at constant speed?

Brakes are applied to a train travelling at75km/hr.after passing over 200m,its velocity is reduced to 36km/hr.at the same rate of retardation,how much further it will go before coming at rest.