In: Physics
lamda1 = 3.7 uC/cm
pic for#1
1) A cylinder of radius a = 6.4 cm and height h = 11.9 cm is aligned with its axis along the y-axis as shown. What is the total flux ? that passes through the cylindrical surface? Enter a positive number if the net flux leaves the cylinder and a negative number if the net flux enters the cylnder.
pic for #2
2)Another infinite line of charge with charge density ?2 = -11.1 ?C/cm parallel to the y-axis is now added at x = 3.05 cm as shown.
What is the new value for Ex(P), the x-component of the electric field at point P?
3)What is the total flux ? that now passes through the cylindrical surface? Enter a positive number if the net flux leaves the cylinder and a negative number if the net flux enters the cylnder.
pic for #4
4)The initial infinite line of charge is now moved so that it is parallel to the y-axis at x = -3.05cm.
What is the new value for Ex(P), the x-component of the electric field at point P?
5)What is the total flux ? that now passes through the cylindrical surface? Enter a positive number if the net flux leaves the cylinder and a negative number if the net flux enters the cylnder.
Flux = charge enclosed
1. flux = lambda1 * h = 44 microCoulomb
3. flux = 11.9*(3.7 - 11.1) = -88 microC
5. flux = 11.9*(3.7 - 11.1) = -88 microC (same as above)
Electric field = lambda/(2Pi*epsilon0*r)
2. E = 9e9 (lambda1/(2r1)+lambda2/(2r2)) = -1.23 megaVolt/m
4. E = 9e9 (lambda1/(2r1)+lambda2/(2r2)) = -1.31 megaVolt/m