Top 350+ Solved Electromagnetics MCQ Questions Answer
Q. The electric field intensity at a point situated 4 metres from a point charge is 200 N/C. Ifthe distance is reduced to 2 metres, the field intensity will be
a. 400 n/c
b. 600 n/c
c. 800 n/c
d. 1200 n/c
Q. The lines of force due to charged particles are
a. always straight
b. always curved
c. sometimes curved
d. none of the above
Q. The electric field at a point situated at a distance d from straight charged conductor is
a. proportional to d
b. inversely proportional to d
c. inversely proportional to d
d. none of the above
Q. The direction of electric field due +0 positive charge is .
a. away from the charge
b. towards the charge
c. both (a) and (6)
d. none of the above
Q. A field line and an equipotential surface are
a. always parallel
b. always at 90°
c. inclined at any angle 0
d. none of the above
Q. The ability of charged bodies to exert force on 6ne another is attributed to the existenceof
a. electrons
b. protons
c. neutrons
d. electric field
Q. If the sheet of a bakelite is inserted between the plates of an air capacitor, thecapacitance will
a. decrease
b. increase
c. remains unchanged
d. become zero
Q. A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is
a. 0.024 f
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
Q. If three 10 uF capacitors are connected in parallel, the net cararitance is
a. 20 uf
b. 30 ue
c. 40 uf
d. 50 uf
Q. Which of the following is not a vector ?
a. linear momentum
b. angular momentum
c. electric field
d. electric potential
Q. Two plates of a parallel plate capacitor after being charged from a constant voltagesource are separated apart by means of insulated handles, then the
a. voltage across the plates increases
b. voltage across the plates decreases
c. charge on the capacitor decreases
d. charge on the capacitor increases
Q. If A.C. voltage is applied to capacitive circuit, the alternating current can flow in thecircuit because
a. varying voltage produces the charg¬ing and dicharging currents
b. of high peak value
c. charging current can flow
d. discharge current can flow