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QB Unit 4

This document contains a question bank for the unit on electrodynamic fields from the 19EET201 Field Theory course at SNS College of Technology. It includes 10 single-mark questions in Part A covering concepts like Faraday's law of induction, Lenz's law, transformer emf, motional electric and emf fields, and time harmonic fields. Part B contains 7 multi-mark questions requiring explanations and derivations related to methods of EMF generation, Maxwell's equations, displacement current, conduction and displacement current densities, the relationship between field and circuit theories, and Faraday's law of electromagnetic induction.

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B.CHRISTY JULIET SNS
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11 views2 pages

QB Unit 4

This document contains a question bank for the unit on electrodynamic fields from the 19EET201 Field Theory course at SNS College of Technology. It includes 10 single-mark questions in Part A covering concepts like Faraday's law of induction, Lenz's law, transformer emf, motional electric and emf fields, and time harmonic fields. Part B contains 7 multi-mark questions requiring explanations and derivations related to methods of EMF generation, Maxwell's equations, displacement current, conduction and displacement current densities, the relationship between field and circuit theories, and Faraday's law of electromagnetic induction.

Uploaded by

B.CHRISTY JULIET SNS
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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SNS COLLEGE OF TECHNOLOGY

(An Autonomous Institution)


AN

COIMBATORE-35
DEPA DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING

19EET201-Field Theory
Question Bank
UNIT- IV

ELECTRODYNAMIC FIELDS
PART- A (2 MARKS)

1. State Faraday’s law of induction .


2. State lenz’s law
3. Give the equation of transformer emf
4. What is motional electric field?
5. What is motinal emf ?
6. What is the emf produced by moving loop in time varying field?7. What is time harmonic field ?
7. Give time harmonic maxwell’s equation in point form. assume time factor e-it.
8. Distingush between Field theory and Circuit theory
9. Write Maxwell’s equation in point and integral form for good conductors.
10. What Is significance of displacement current density?
11. In a material for which = 5s/m and r= 1 and E=250 sin 1010t (V/m) find the conduction and
displacement current densities.

PART- B

1. What are the different ways of EMF generation? Explain with the governing equations and
suitable practical examples.
2. With necessary explanation, derive the Maxwell’s equation in differential and integral forms .
3. (a) What do you mean by displacement current? write down the expression for the total current
density.
3. (b) In a material for which =5 s/m and r=1 and E=250 sin 1010t (V/m).find the conduction and
displacement current densities.
4 .(a) Find the total current in a circular conductor of radius 4mm if the current density varies
according to J=104/R A/m2 .
4. (b) Given the conduction current density in a lossy dielectric as Jc=0.02 sin 109 t A/m2 .find the
displacement current density if =103 mho/m and r=6.5 .
5 (a) Explain the relation between field theory and circuit theory.
5 (b)The magnetic field intensity in free space is given as H=H0sin ay t A/m.where = t-z and is a
constant quantity. Determine the displacement current density.
6 (a) Write short notes on faradays law of electromagnetic induction.
6 (b) Show that the ratio of the amplitudes of the conduction current density and displacement
current density is , for the applied field amplitude ratio if the applied field is E=Em e-t/ where is
real.
7. Derive General field relation for time varying electric and magnetic fields using Maxwell’s’
equations.

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