Top 250+ Solved Electromagnetic Field MCQ Questions Answer
Q. In__________array, radiation is perpendicular to array orientation.
a. Broadside
b. End fire
c. None of these
d. Cannot say
Q. In__________array, radiation is in the same direction as the arrayorientation.
a. Broadside
b. End fire
c. None of these
d. Cannot say
Q. A large aperture means antenna gain will be__________.
a. Large
b. Small
c. None of these
d. Cannot say
Q. A short dipole antenna is__________.
a. Left end-fed
b. Right end-fed
c. Centre-fed
d. None of these
Q. The force between two charges is 120 N. if the distance between thecharge is doubled, the force will be
a. 60 N
b. 30 N
c. 40 N
d. 15 N
Q. The electric field intensity at a point situated at 4 meters away from a point charge 200 N/C. if the distance is reduced to 2 meters, the field intensity will be.
a. 400 N/C
b. 600 N/C
c. 800 N/C
d. 1200 N/C
Q. A hole of radius b (b < a) is now drilled along the length of the wire at a distance d from the center of the wire as shown below. The magnetic field inside the hole is
a. uniform and depends only on d
b. uniform and depends only on b
c. uniform and depends on both b and d
d. non uniform
Q. The line of force due to charged particles are always
a. Always straight
b. Always curve
c. Always circle
d. None of the above
Q. The electric field at a point situated as a distance d from straightcharged conductor is
a. Proportional to d
b. Inversely proportional to d
c. Inversely proportional to distance
d. None of the above
Q. The direction of electric field due to +0 positive charge is
a. Away from the charge
b. Towards the charge
c. Both (a) & (b)
d. None of the above
Q. A field line and equipotential surface are
a. Always parallel
b. Always at 90 angle
c. Inclined at any angle
d. None of the above
Q. The ability of charged bodies to exert force on any another isattributed to the existence of
a. Electrons
b. Protons
c. Neutrons
d. Electric field
Q. A capacitor stored 0.24 coulombs at 10 volts ,its capacitance is
a. 0.024F
b. 0.12 F
c. 0.6 F
d. 0.8 F
Q. For making a capacitor , it is better to select a dielectric having
a. Low permittivity
b. High permittivity
c. Permittivity same as that of air
d. Permittivity slightly more than that of air