Test: Electromagnetics - 1 - Electronics and Communication Engineering (ECE) MCQ

The characteristic impedance of a lossless transmission line at is _________________ (ohms)

Assertion (A)    :    Magnetic field is continuous and always rotational.
Reason (R)    :  

An electric wave propagating through a lossless medium  is given by    :the phase constant β is given by

Assertion (A)    :    Polarization is always defined in terms of electric field orientation.
Reason (R)    :    Magnetic field is due to induced effect of electric field so we cannot measure it directly.

Consider a wave which is having a phase velocity of 3x10⁸m/s .Find the group ✓elocitv and the medium in which it is travelling

Phase difference between E and H in a high loss medium is _______________ (Degrees)

On the smith chart the location of the normalized load point is at 0.15λ, with reference to wavelength towards generator (WTG), scale operating wavelength is 4 cm. The location of first v_max from load is

Which of the following statements on a smith chart are correct?
1.    Moving in clockwise direction is analogous to moving towards generator.
2.    VSWR circles can be plotted on a smith chart.
3.    Smith chart is the superposition of locus of VSWR and reflection coefficients.
4.    To complete a distance of 0.75λ. it's enough to move 0.5λ. towards aenerator.

S-matrix for two port transmission line is given by  . The reflection
coefficient and the transmission power through port 1 for input power of 5 mW is

Match the following

For a waveguide component whose VSWR is 1.4 when the component is terminated with a matched load. The power to the matched load is 25 mW for an input power of 100 mW. The same results are obtained when component is reversed, then the S-matrix is

The propagation constant of a transmission line with impedance and admittance of 9 and 16 respectively is