1. A charge distribution lies along a segment of the positive x axis
A charge distribution lies along a segment of the positive x axis. On that segment, the linear
charge density l is where b is a constant
having units of Coulombs. What is the charge on an infinitesimal length dx' of the charged segment? a)
b) q dx' c) l d) b e) b dx'

2. In Coulomb's Law for the Electric Field,
what does the r stand for?
a) Radius
b) The separation of the charged particle and the point in space at which the electric field is being calculated.
c) The separation of the two charged particles.
d) None of the above.

3. Three charged particles lie on the x axis: one at the origin, one to the left of the origin (that is, at a position having a negative x value), and another to the left of that one. A person is asked to determine the electric field due to the trio, at a point on the positive y axis. The person determines the distance r that each particle is from the point on the y axis in question and
then calculates the value of for each of the
three particles in turn. Then the person adds the three values thus determined and gives the sum as the total electric field at the point on the y axis in question. Is this procedure correct?
a) Yes.
b) No.

4. In calculating the electric field due to a charged line segment, one considers each bit of the line segment to be a point charge.
a) True.
b) False.