A non-conducting sphere of radius R = 7 cm carries a charge Q = 4 mC distributed uniformly throughout its volume. At what distance, measured from the center of the sphere does the electric field reach a value equal to half its maximum value?
My attempt:
Emax= q(4mC)/7
r= 7/2 cm = 3.5...
explanation
this is what i was thinking
F because of one charge=kqQ/(b^2+l^2/2) * cos(theta)
=kqQ/(b^2+l^2/2) *b/sqrt(b^2+l^2/2)
=kqQb/(b^2+l^2/2)^(3/2) (along the perpendicular )...
explanation
This is what i was thinking:
F because of one charge=kqQ/(b^2+l^2/2) * cos(theta)
=kqQ/(b^2+l^2/2) *b/sqrt(b^2+l^2/2)
=kqQb/(b^2+l^2/2)^(3/2) (along the perpendicular )...
This is what i was thinking:
F because of one charge=kqQ/(b^2+l^2/2) * cos(theta)
=kqQ/(b^2+l^2/2) *b/sqrt(b^2+l^2/2)
=kqQb/(b^2+l^2/2)^(3/2) (along the perpendicular )...
Two large non-conducting plates of surface area A = 0.25 m^2 carry equal but opposite charges Q = 75 uC. What is the energy density of the electric field between the two plates?
My attempt:
E=(charge density)/epsilon
And
U=1/2*epsilon*E^2
So
U=0.5(charge density)^2/epsilon...
Four charges of magnitude +q are placed at the corners of a square whose sides have a length d. What is the magnitude if the total force exerted by the four charges on a charge Q located a distance b along a line perpendicular to the plane of the square and equidistant from the four charges...
Outside a spherically symmetric charge distribution of net charge Q, Gauss’s law can be used to show that the electric field at a given distance
a) must be greater than zero
b) must be zero
c) acts like it originated in a point charge Q at the center of distribution
d) must be directed...
Two large non-conducting plates of surface area A= 0.25m^2 carry equal but opposite charges Q=75uC. What is the energy density of the electric field between the two plates?