Answer to Question #51718 in Electricity and Magnetism for samuel

Question

The electric potential difference between two points A and B is 42 V. What is the work done by an external agent in carrying a charge of 5.0×10−5C
5.0× 10 −5 C from A to B at constant speed?
a. 2.1×10 −3 J
b. 8.4×10 −4 J
c. 21×10 −4 J
d. 8.4×10 −3 J

From Gauss’ law which of the following is NOT correct?

a.The outward flux of electric field through an enclosed surface is proportional to the electric charges enclosed
b. The field at a point outside a spherically symmetric charge is the same as the electric field at the same point due to a point charge at its centre.
c. The electric flux through a Gaussian surface is a vector product of the electric field and a unit vector perpendicular to and outward from the surface
d. The total electric flux through a cylinder placed in an electric field with its axis parallel to the field is zero