Electricity and Magnetism Answers

An electron enters a magnetic field of flux density 7.6*10^-3 and an electric field of intensity 5.6*10^3 Vm-1 .

a. Find speed of the electron after passing through the plate

b. Calculate radius of curvature of path in magnetic field only

A sphere with a radius of half a centimetre is having a 1 kV potential. A proton which was (at the beginning) on the surface of the sphere is suddenly let loose to go off. At what speed will the proton be travelling when it is 1.0 cm away from the surface of the sphere?

QUESTION 1

An electric field is generated in between two parallel hundred-square-centimetre electrodes that are separated by a distance of 2 cm. We have the one plate charged to 5.0 nano-Coulombs and the other one exactly equal but opposite. An additional "square-shaped" surface ( with side length of a centimetre) is placed in between the plates and rotated such that it makes an angle of pi/4 radians with the electric field. Determine the flux of the electric field through the square surface.

A charge q1=3.00 micro coulomb is at (0,0) and q2= -"5\/3" q1 is at 20cm mark on the positive x-axis. we also have a charge q3=8/5 q2 located at some unknown point on the x-axis. Where is q3 if the net force on q1 is 7.00N pushing q1 to the left?

dielectric sphere of radius R is hollowed out in the region 0 ≤ r ≤ s and a

thin, grounded, conducting shell is inserted at r = s. The sphere is placed in a uniform,

external E⃗ -field E⃗ = E0ẑalong the z axis. The dielectric constant of the hollowed sphere is εr

. Calculate the potential in the region r ≥ R.

calculate electric field through the spherical surface of diameter 50cm if the magnitude of the electric field is 1920 N/C and makes an angle of 30degree with the unit vectors

A proton moves at 8x10^6 m/s along the x axis. It enters a region in which there is a magnetic field of magnitude 2.5 T directed at an angle of 60.0 degrees with the y axis and laying on the x-y plane. Find A) The magnitude and direction of the force on the proton B) The protons initial acceleration C) Is there any change in magnitude and direction and the initial acceleration if the charged particles are electron instead of proton

The outer surface of the cardboard center of a paper tower roll ________________

a. is a possible Gaussian surface

b. cannot be a Gaussian surface because it is not a closed surface

c. cannot be a Gaussian surface since it is an insulator

d. cannot be a Gaussian surface because it encloses no charge