Chapter 2: Coulomb’s Law and Electric Field Intensity

Quiz

1. Q 1 and Q 2 are two point charges, which are a distance 8 cm apart. The force acting on Q 2 is given by , N.

Now we replace Q 2 with a charge of the same magnitude but opposite polarity, , and we place Q 3 a distance 24 cm away from Q 1. What is the vector of the force acting on Q 3?

, N

, N

, N

, N



2. The intensity of the field due to a point charge Q 1 a distance cm away from it is V/m. What is the intensity of the field of a charge at a distance cm from it?

, V/m

, V/m

, V/m

, V/m



3. The intensity of the field due to a line charge a distance cm away from it is V/m. What is the intensity of the field of the line charge at a distance cm from it?

, V/m

, V/m

, V/m
, V/m


4. Charge Q is uniformly distributed in a sphere of radius . How is the charge density going to change if this same charge is now occupying a sphere of radius ?

It will increase 4 times.

It will increase 64 times.

It will increase 16 times.

It will decrease 2 times.



5. A line charge C/m is located at , and is along the z-axis. Calculate the surface charge density ( ) and the location ( ) of an infinite planar charge distributed on the plane at , so that the total field at the point , m, is zero.

C/m 2 , m

C/m 2 ,

C/m 2 , m

C/m 2,