Top 250+ Solved Electromagnetic Theory MCQ Questions Answer
Q. The phenomenon of an uncharged body getting charged merely by the nearness of acharged body is known as
a. pholoelectric effect
b. chemical effect
c. magnetic effect
d. induction
Q. The number of Faraday tubes of flux passing through a surface in an electric field iscalled
a. electric flux
b. electric flux density
c. magnetic flux density
d. electric charge density
Q. The value of E within the field due to a point charge can be found with the help of
a. Faraday's laws
b. Kirchhoff s laws
c. Coulomb's laws
d. none of the above
Q. at a point may be defined as equal to the lines of force passing normally through a unitcross section at that point.
a. Electric intensity
b. Magnetic flux density
c. Electric flux
d. None of the above
Q. Electric intensity at any point in an electric field is equal to the at that point.
a. electric flux
b. magnetic flux density
c. potential gradient
d. none of the above
Q. Electric displacement is a______quantity.
a. scalar
b. vector
c. both of the above
d. none of the above
Q. at a point is equal to the negative potential gradient at that point.
a. Electric intensity
b. Electric flux
c. Magnetic flux
d. Magnetic flux density
Q. Dielectric strength ______ with increasing thickness
a. increases
b. decreases
c. remains unaltered
d. none of the above
Q. The property of a capacitor to store electricity is called its
a. capacitance
b. charge
c. energy
d. none of the above
Q. is that property of a capacitor which delays any change of voltage across it.
a. Inductance
b. Capacitance
c. Potential gradient
d. None of the above
Q. A capacitance of 100 fiF is connected in series with a resistance of 8000 £2. The timeconstant of the circuit is
a. 0.2 s
b. 0.4 s
c. 0.6 s
d. 0.8 s
Q. In a cable capacitor, voltage gradient ismaximum at the surface of the
a. earth
b. conduction
c. sheath
d. insulator
Q. The time constant of an R-C circuit is defined as the time during which capacitorcharging voltage actually rises to ______ percent of its______value.
a. 37, initial
b. 63.2, initial
c. 63.2, final
d. 37, final