Top 250+ Solved Electromagnetic Theory MCQ Questions Answer
Q. A capacitor consists of
a. two insulators separated by a con¬ductor
b. two conductors separated by an in¬sulator
c. two insulators only
d. two conductors only
Q. A paper capacitor is usually available in the form of
a. tubes
b. rolled foil
c. disc
d. meshed plates
Q. Air capacitors are generally available in the range
a. 10 to 400 pF
b. 1 to 20 pF
c. 100 to 900 pF
d. 20 to 100 pF
Q. A capacitor charged to 200 V has 2000 (iC of charge. The value of capacitance will be
a. 10 F
b. 10 uF
c. 100 nF
d. 1000 uF
Q. A capacitor in a circuit became hot and ultimately exploded due to wrong con¬nections,which type of capacitor it could be ?
a. Paper capacitor
b. Ceramic capacitor
c. Electrolytic capacitor
d. Any-of the above
Q. The absolute permittivity of free space is given by
a. 8.854 x 1(T9 F/m)
b. 8.854 x 1(T10 F/m)
c. 8.854 x KT11 F/m
d. 8.854 x 10"12 F/m
Q. Electric field intensity is a quantity
a. scalar
b. vector
c. both (a) and (6)
d. none of the above
Q. When 4 volts e.m.f. is applied across a 1 farad capacitor, it will store energy of
a. 2 joules
b. 4 joules
c. 6 joules
d. 8 joules
Q. The capacitor preferred for high frequency circuits is
a. air capacitor
b. mica capacitor
c. electrolytic capacitor
d. none of the above
Q. The capacity of capacitor bank used in power factor correction is expressed in terms of
a. kW
b. kVA
c. kVAR
d. volts
Q. While testing a capacitor with ohm-metre, if the capacitor shows charging, but the finalresistance reading is appreciably less than normal, it can be concluded that the capacitor is
a. short-circuited
b. open circuited
c. alright
d. leaky
Q. If a 6 (iF capacitor is charged to 200 V, the charge in coulombs will be
a. 800 uC
b. 900 uC
c. 1200 uC
d. 1600 uC