Answer to Question #61337 in Electricity and Magnetism for muhammad umar

Question

3) the electrical force on a negative charge located near an isolated positive charge
a) points away from the isolated charge
b) is tangent to a circle centred about the isolated charge
c) points toward the isolated charge
d) is zero
4) The average velocity of the electrons in a piece of wire of cross-sectional area
2.0×10−6m2
is
2.5×10−4m/s
when a steady current of 4.0 A is flowing. Calculate the number of free electrons per unit volume of the material

a) 3×1019

b) 5×1020

c) 2×1023

d) 5×1028