Top 250+ Solved Electromagnetic Field MCQ Questions Answer
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 (b)
d. none of the above
Q. When 4 volts e.m.f. is applied across a 1 farad capacitor, it will storeenergy 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 isexpressed 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 final resistance 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
Q. Which capacitor will be physically smaller for the same ratings ?
a. Ceramic capacitor
b. Paper capacitor
c. Both will be of equal size
d. None of the above
Q. What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?
a. 50 pF
b. 100 pF
c. 150 pF
d. 200 pF
Q. A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?
a. Ceramic capacitor
b. Mica capacitor
c. Both will have identical value of capacitance
d. It depends on applied voltage
Q. Which of the following material has least value of dielectric constant ?
a. Ceramics
b. Oil
c. Glass
d. Paper
Q. Which of the following capacitors will have the least value ofbreakdown voltage ?
a. Mica
b. Paper
c. Ceramic
d. Electrolytic