Question

Please I really need the right answers for this question with all the correct steps, formulas, and units as soon as possible, please. Thank You.

1) Two surfaces are near two different charged objects, and the surfaces are identical in size. Surface A has N field lines passing perpendicularly through it. Surface B has only N/2field lines passing through it, and they pass through at an angle 78 ? from normal. Part A:-  By how much does the field line density greater near surface B than near surface A?

Please I really need the right answers for this question with all the correct steps, formulas, and units as soon as possible, please. Thank You.

Answer 1

The Flux through surface A isGiven By,

= EA cos (90-90)

= EA cos 0

N =EA

From this E = N/A         ----------( 1)

The Flux through surface B is given by,

' = E ' A cos (78)

= E 'A cos 78

N/2=0.2079 E 'A

E ' = (N/2) /0.2079 A

= 0.5 N / 0.2079A

= 2.405 N/A

Required answer is E ' / E = (2.405 N / A)/(N/A)

                                       = 2.405