Electricity and Magnetism Answers

A radio station broadcasts 50kW (effective) from its transmitter at 810kHz. Find the ERMSand BRMSfor the electromagnetic radiation at a distance of 1km from the transmitter. NOTE: The give effective power assumes spherical symmetry; in practice the power is less because they send it out horizontally

a balloon with a charge of 6.0 x 10^-5 C is held at a distance of .10m from a second ballon with the same charge what is the repulsive force and why

what other symmetries we can use in guass law other than spherical, cylindrical ?

if we have 13 charges in a circle then what will be the electric field at the centre? and how we calculate it

define quadrupole moment of a charge distribution.

For a magnetic needle placed in a uniform magnetic field, which of following are correct :
a) F ≠ 0, τ ≠ 0
b) F ≠ 0, τ = 0
c) F = 0, τ ≠ 0
d) F = 0, τ = 0

Two like charged balloons have a force of .420 if the force is increased by a factor of four and the distance is doubled, what is the charge?

Two metal balls A and B of negligible radius are floating at rest on Space Station Freedom between two metal bulkheads, connected by a taut nonconducting thread of length 2.00m. Ball A carries charge q, and ball B carries charge 2q. Each ball is 1.00m away from a bulkhead.
(a) If the tension in the string is 2.50 N, what is the magnitude of q?
(b) What happens to the system as time passes? Explain.

A point charge of +3.0 x 10-7 coulomb is placed 2.0 x 10-2 m from a second point charge of +4.0 x 10-7 coulomb. The magnitude of the electrostatic force between the charges is _____.

what is physical significance of electric field ?