Top 250+ Solved Electromagnetic Field MCQ Questions Answer
Q. Spherical coordinate system is a _________.
a. right-handed syste.
b. left-handed system
c. both (a)and (b)
d. none of these
Q. Which of the following materials has the highest value of dielectricconstant?
a. Glass
b. Vacuum
c. Ceramics
d. Oil
Q. Which of the following capacitors will have the least variation ?
a. Paper capacitor
b. Ceramic capacitor
c. Silver plated mica capacitor
d. None of the above
Q. Which of the following statements is incorrect ?
a. The leakage resistance of ceramic capacitors is generally high
b. The stored energy in a capacitor decreases with reduction in value of capacitance
c. The stored energy in a capacitor increases with applied voltage
d. A wire cable has distributed capacitance between the conductors
Q. Which of the following capacitors has relatively shorter shelf life ?
a. Mica capacitor
b. Electrolytic capacitor
c. Ceramic capacitor
d. Paper capacitor
Q. In the case of a lossy capacitor, its series equivalent resistance value will be
a. small
b. very small
c. large
d. zero
Q. When a dielectric slab is introduced in a parallel plate capacitor, the potential difference between plates will
a. remain uncharged
b. decrease
c. increase
d. become zero
Q. Capacitance increases with
a. increase in plate area and decrease in distance between the plates
b. increase in plate area and distance between the plates
c. decrease in plate area and value of applied voltage
d. reduction in plate area and distance between the plates
Q. A capacitor consists of
a. two insulators separated by a conductor
b. two conductors separated by an insulator
c. two insulators only
d. two conductors only
Q. A gang condenser is a
a. polarised capacitor
b. variable capacitor
c. ceramic capacitor
d. none of the above
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 ofcapacitance 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