Travelling Waves Interview Questions:
Following are the below Travelling Waves Interview Questions and Important Questions which is very useful for interviews and exams
1. What is a travelling wave ? Explain the development of such a wave along an overhead transmission line.
2. Starting from first principles show that surges behave as travelling waves.
3. Develop wave equation for an uniform transmission line and find the velocity of its propagation.
4. Discuss the phenomenon of travelling wave over a transmission line conductors.
5. Establish the relation between the voltage and current waves travelling over the transmission line and for their velocity of propagation. Also show that the velocity of wave propagation is same as that of velocity of light for overhead lines.
6. Define crest, front, tail and velocity of a travelling wave.
7. Discuss the phenomenon of wave reflection and refraction.
8. Explain the variation of voltage and current on an overhead line when the far end of the line is (i) short circuited (ii) open circuited and at the supply end a source of constant emf E is switched-in.
9. Discuss the behaviour of a travelling wave when it reaches the end of a (i) short circuited (ii) open circuited transmission line (iii) a line terminated by an impedance equal to surge impedance and (iv) a line connected to a cable.
10. Deduce the general expression for reflection and refraction of travelling waves.
11. Derive the expressions for reflection and refraction coefficients of voltage and current waves for the following cases: (i) terminated through resistance (ii) through a cable.
12. Discuss the reflection phenomenon of travelling waves of voltage and current for a line terminated with a resistive load and hence obtain the reflection coefficient.
13. Discuss the behaviour of a travelling wave when it reaches (i) short circuited (ii) open circuited transmission lines and (iii) line terminated by an impedance equal to surge impedance (Z).
14. Develop an equivalent circuit for the analysis of the behaviour of travelling waves at transition points on a transmission line.
15. Derive an expression for travelling waves in overhead line, also mention interpretation from physical significance point of view.
16. Draw equivalent circuit for determining the transmitted voltage and current surges on a forked or bifurcated line. Derive expressions for the transmitted voltage and currents.
17. Make the analysis of a wave travelling along a line terminated with an inductance L.
18. A unit-step voltage wave is travelling along a line of characteristic impedance ZC. The line terminates in a shunt inductance L. Derive the expression for the voltage at the line and the inductance junction as a function of time.
19. What is the effect of shunt capacitance at the terminal of a transmission line ?
20. Give an expression for the specifying time in case of a line terminated with a parallel combination of resistance and capacitance.
21. Explain Bewley’s lattice diagram.
22. Explain the procedure for drawing Bewley’s lattice diagram with the help of a suitable example.
23. Write short notes on the following :
- Surge impedance and velocity of propagation.
- Specifications of travelling waves.
- Reflection and refraction of travelling waves.
- Equivalent circuit for travelling wave studies.
- Bewley lattice or Zigzag diagram.