Page 94 - Basic Electrical Engineering

1. Give an overview of the scope of electrical and electronics engineering.
2. Charge in motion is called current. Explain with the help of atomic theory.
3. Distinguish between conductors, semiconductors, and insulators.
4. Distinguish between Work, Power, and Energy.
5. Differentiate between temperature coefficient of resistance and specific resistance.
6. Distinguish between an electric field and a magnetic field.
7. Define the following terms: Volt, Ampere, Ohm.
8. Explain why two parallel current-carrying conductors attract each other when current in them
flow in the same direction.
9. State Fleming’s Right-Hand Rule.
10. Explain that the EMF induced in a coil depends upon the flux and the speed of rotation of the
coil.
11. Distinguish between statically induced EMF and dynamically induced EMF.
12. Explain why an iron-core coil will have more inductance than an air-core coil of the same
number of turns.
13. What is the meaning of coefficient of coupling between two coils? When is this value equal to
unity and equal to zero?
14. What are Faraday’s laws of electromagnetic induction?
15. What is the Lenz’s law? Give an example.
16. What is the magnitude of force experienced by a current-carrying conductor placed in a
magnetic field?
17. How do you determine the direction of force developed in a current-carrying conductor placed
in a magnetic field?
18. What are the factors on which inductance of a coil depends?
19. Why does the inductance of a coil increase if the core has a magnetic material instead of air?

20. Derive the following expression for self-inductance of a coil

21. You have to make an inductance of high value. How will you proceed?
22. What is Fleming’s Right-Hand Rule? Where is it used?
23. What rule do you apply to determine the direction of force on a current-carrying conductor
placed in magnetic field?
24. What is the magnitude of force on a current-carrying conductor placed in a magnetic field?

25. Show that the energy stored in a magnetic field produced by an inductor is

26. Distinguish between self-inductance and mutual inductance.
27. Explain why inductance of a coil increases if an iron piece forms its core instead of air or any
non-magnetic material.

28. Establish the relation, for two adjacent coils linking flux.

29. On what factors does the reluctance of a magnetic material depend?
30. What is the cork screw rule? Where do you use it?