Electricity and Magnetism Answers

1.What is the magnitude and direction of the field at 0.25 m from a -5.6×10^-6 C point charge.

shield concept of microwaves in microwave oven experiment

Calculate the electric field experienced by a negative test charge given that source charge is +6.78 𝑥 10−15𝐶 and 7.9 𝑥 10−19𝑚 as the distance from the source charge

There is a set of twins, one an

astronaut, the other works for mission control of NASA. The astronaut leaves on

a deep space trip traveling at 95% the speed of light. Upon returning the

astronauts clock has measured ten years, so the astronaut has aged 10

years. What is the time that the

earth-bound brother measures while his twin was on his exploration in space?

How old is he?

Assume that lightning strikes completely vertically and that a known current flows from the cloud into the ground for some time. We want to detect a lightning strike with the help of a coil that is connected directly to a voltmeter. Explain which phenomenon is responsible for lightning detection. Sketch the magnetic field of lightning and how the coil should be oriented for the effect to be strongest.

Suppose the x − y plane is electrically charged with a constant charge density σ.

Find the electric field at a hight h from the x − y plane.Use gauss law

Each of two small spheres is charged positively, the total charge being 52.6 wC. Each sphere is repelled from the other with a force of 1.19 N when the spheres are 1.94 m apart. Calculate the charge on each sphere. 

b) Do the following fields satisfy all four Maxwell's equations? E(t)=E_(0)sin x sin t , B(t)=B_(0)cos x cos t

A flat circular coil with 40 loop of wire has a diameter of 32cm what current most flow in it's wire to produce a field in air of 3.0x10^-4 w/m2 or centre

10. Find the intensity of a magnetic field at a point 2 sm away from an infinitely long conductor which a current of 5 A flows through.