Electromagnetic Theory Tough Online Exam Quiz
Electromagnetic Theory Tough GK Quiz. Question and Answers related to Electromagnetic Theory Tough. MCQ (Multiple Choice Questions with answers about Electromagnetic Theory Tough
A lossless line having 50 ohm characteristic impedance and length wavelength/4 is short circuited at one end connected to an ideal voltage source of 1V at the other end. The current drawn from the voltage sources is
Options
A : 0
B : 0.02
C : Infinity
D : 50
One end of a lossless transmission line having the characteristic impedance of 75 ohm and length of 1 cm is short circuited. At 3 GHz, the input impedance at the other end of the transmission line is
Options
A : 0
B : Resistive
C : Inductive
D : Capacitive
The minimum distance of the stub from the load side is 5 cm. Calculate the guided wavelength of the transmission line.
Options
A : 5 cm
B : 2.5 cm
C : 10 cm
D : 1.25 cm
For maximum power transfer, a lossless transmission line 50 ohm is to be matched to a resistive load impedance of 100 ohm. The characteristic impedance of the wavelength/4 transformer is
Options
A : 70.7
B : 50
C : 100
D : Infinity
For an electromagnetic wave incident from one medium to a second medium, total internal reflection takes place when
Options
A : Angle of incidence is equal to the Brewster angle with E field perpendicular to the plane of incidence
B : Angle of incidence is equal to the Brewster angle with E field parallel to the plane of incidence
C : Angle of incidence is equal to the critical angle with the wave moving from the denser to rarer medium
D : Angle of incidence is equal to the critical angle with the wave moving from the rarer to denser medium
Copper behaves as a
Options
A : Conductor always
B : Conductor or dielectric depending on the applied electric field strength
C : Conductor or dielectric depending on the frequency
D : Conductor or dielectric depending on the electric current density
In an impedance Smith chart , a clockwise movement along a constant resistance circle gives rise to
Options
A : Decrease in reactance
B : Increase in reactance
C : No change in reactance
D : No change in impedance
In a good conductor the phase relation between the tangential components of electric E and the magnetic field H is as follows
Options
A : E and H are in phase
B : E and H are out of phase
C : H leads E by 90
D : E leads H by 45
A transmission line is distortionless if
Options
A : RL = 1/GC
B : RL = GC
C : LG = RC
D : RG = LC
The capacitance per unit length and the characteristic impedance of a lossless transmission line are C and Z respectively. The velocity of a travelling wave on the transmission line is
Options
A : ZC
B : 1/ZC
C : Z/C
D : C/Z
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