The electric field intensity due to an infinite cylinder of radius R and having charge q per unit length at a distance rir r(r > R) from its axis is
A. directly proportional to r².
B. directly proportional to r3.
C. inversely proportional to r.
D. inversely proportional to r².
Answer:D
The electric field intensity due to an infinite cylinder of radius R and having charge q per unit length at a distance rir r(r > R) from its axis is
A. directly proportional to r². B. directly proportional to r3. C. inversely proportional to r. D. inversely proportional to r².