Electricity and Magnetism Answers

A uniform magnetic field strength 0.50T is directed at an angle of 60° to a plane of 100 turn,rectangular copper coil of length 0.04m and width 0.05m. The diameter of the copper wire which make up the coil is 1.00mm and resistivity is 1.7×10^-8 ohms metre.The magnetic field through the loop decreases to zero in 0.3seconds ,Determine
1)The initial flux through the coil
2)The average induced e.m.f in the coil as the field decreases

The lithium atom has 3 electrons. Then the number of electrons in the negative ion in the lithium will be

[img]https://upload.cc/i1/2020/05/09/7UPKyl.jpg[/img]





R=4

A point charge Q1=3uc at origin and a point charge Q2=-7 uc is placed at x= 0.4m on the x axis or cartesian system.determine the electric field E(x)=E(x)x at all points along x axis

A heat lamp is used to treat a swollen leg. The lamp has an rms electric field of 3550 N/C. What is the maximum value of the electric field? What is the maximum intensity of the lamp? If the lamp if focused over a circular area of diameter 4.0 cm, what is the power delivered to the leg?

What is the critical angle for a diamond-air interface? What happens if a ray of light is incident at angles of 20degrees, 24degrees and 50degrees?

The indices of refraction of the core and cladding of an optical fiber are 1.5 and 1.40, respectively. Light is incident at the core at 70%. What is the distance between two successive reflections in the core it its diameter is 0.05mm?

A proton (mass m, charge +e) and an alpha particle (mass 4m, charge +2e) approach one another with the same initial speed v from an initially large distance. How close will these two particles get to one another before turning around?

a) Plot currents through the capacitor and the inductance of a series RLC circuit at resonance on
the same graph as functions of time. (b) What is the phase difference between the current and the
total voltage at frequency w>w0 , such that current amplitude is Imax/√2 ?

a) Plot currents through the capacitor and the inductance of a series RLC circuit at resonance on
the same graph as functions of time. (b) What is the phase difference between the current and the
total voltage at frequency   0 , such that current amplitude is Imax/√2 ?