According to Coulomb’s law, the force of attraction or repulsion, between to electrical charges is

A)
directly proportional to the distance between them
B)
inversely proportional to the distance between them
C)
directly proportional to the square of the distance between them
D)
inversely proportional to the square of the distance between them.

Correct Answer : Option (D) :   inversely proportional to the square of the distance between them.

Explanation : Coulomb’s law states that the force of attraction or repulsion, F between two charges q1 and q2 coulombs, connected at two different points in a medium, is directly proportional to the product of their magnitude and inversely proportional to the square of distance r between them.

Recently Updated in Electromagnetic Field Theory Questions
Radiation intensity in a given direction is the
A)
Energy radiated per square metre
B)
Power radiated per square metre
C)
Power radiated per unit solid angle in that direction
D)
None of the above

Correct Answer :   Power radiated per unit solid angle in that direction

Which of the following impedance inversion is obtained?
A)
Balun transformer
B)
A quarter wave line
C)
Short-circuited stub
D)
A half wave line

Correct Answer :   A quarter wave line

The wave in wave guide has
A)
Larger frequency than in the free space
B)
Diminishing wavelength than in the free space
C)
Group velocity inversely proportional to wavelength
D)
Larger wavelength than in the free space

Correct Answer :   Larger wavelength than in the free space

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