Electricity and Magnetism Answers

the long cylindrical conductor with radius (a) is surrounded by coaxial cylindrical conducting shell with inner radius (b) .determine the capacitance per unit length possist capacitance,assuming the medium between the two concentric cylinder is vacuum.

an iron ring having area 400mm² is mean diameter 25cm having number of turns 500.Assume relative permeability 250 resistance 474 ohm and voltage 240v . Find the flux.

The human ear can hear sounds at frequencies from 20 Hz- 20,000 Hz. What are the wavelength equivalent to the lowest frequency a human can hear? What will the size of the organ pipe that will play in it is wavelength? The pipeline is 1/2 of the wavelength.

two permanent magnets are put onto a mass scale with unlike poles facing each other. a wire of length 40cm is put between the current of 0.653A is applied. magnetic flux density is 0.02T and the force produced is upwards. what mass would the scale read if it was set to zero before the current turned on

How to heat up a piece of metal to certain degrees that is located at the center of magnetic field , thanks

(a) Twelve equal charges, q, are situated at the corners of a regular 12–sided polygon (for instance, one on each numeral of a clock face). What is the net force on a test charge Q at the center? (b) Suppose one of the 12 q’s is removed (the one at “6 o’clock”). What is the force on Q? Explain your reasoning carefully (c) Now 13 equalcharges, q,areplacedatthecornersofaregular 13–sidedpolygon. Whatisthe force on a test charge Q at the center? (d) If one of the 13 q’s is removed, what is the force on Q? Explain your reasoning.

In an experiment, the tiny droplets of the negatively electrified oil are dropping through a vacuum. Magnitude of the electric field is 5.92×104 NC−1. Direction of the electric field is assumed to be downward. (a)Anexperimenterobservesaoneparticulardropletandthatdropletremainssuspendedagainst gravity. Assume the mass of the droplet to be 2.93×10−15 kg. What is the charge carried by the droplet? (b) Now another droplet of same mass falls, in the vacuum, from rest to 15.3cm in 0.275s. What is the charge on the droplet in this case?

A television loop antenna has a diameter of 2.1m. The magnetic field of a TV signal is normal to the plane loop and, its magnitude is 0.42 T. Calculate the magnetic flux produced.

an electric field of magnitude 3.50 kn c is applied along the x-axis. calculate the electric flux through a rectangular plane 0.35m wide and 0.7m long a)if the plane is ||le to the yz plane b)if the plane is ||le to the XY plane and c)if the plane contain the y-axis and its normal make an angle of 40.8 degrees with the x-axis