Top 350+ Solved Electromagnetics MCQ Questions Answer
Q. The electrical length in a transmission line refers to the
a. product of attenuation constant and length
b. ratio of attenuation constant and length
c. product of phase constant and length
d. ratio of phase constant and length
Q. The propagation constant of a wave with attenuation and phase constantgiven by 2 and 3 respectively is
a. 2 – 3j
b. 3 – 2j
c. 2 + 3j
d. 3 + 2j
Q. Identify the secondary parameter from the options given below.
a. resistance
b. conductance
c. phase constant
d. capacitance
Q. Which of the following parameters does not exist in the transmission lineequation?
a. r
b. zo
c. zl
d. propagation constant
Q. When the length of the transmission line is same as that of the wavelength,then which condition holds good?
a. zin = zo
b. z = zo
c. zl = zo
d. zin = zl
Q. The input impedance of a half wave transmission line with a load impedanceof 12.5 ohm is
a. 25
b. 50
c. 6.25
d. 12.5
Q. The condition for a quarter wave transformer is
a. zo2 = zin zl
b. zo = zin zl
c. zl2 = zin zo
d. zo = zin
Q. Find the load impedance in a quarter line transformer with characteristicimpedance of 75 ohm and input impedance of 200 ohm.
a. 28.125
b. 12.285
c. 52.185
d. 85.128
Q. If V = 2x2y – 5z, find its electric field at point (-4,3,6)
a. 47.905
b. 57.905
c. 67.905
d. 77.905
Q. Find the potential between a(-7,2,1) and b(4,1,2). Given E = (-6y/x2 )i + ( 6/x) j + 5 k.
a. -8.014
b. -8.114
c. -8.214
d. -8.314
Q. A field in which a test charge around any closed surface in static path is zero is called
a. solenoidal
b. rotational
c. irrotational
d. conservative