EMF IMPORTANT QUESTIONS

II Yr. ECE_IVth Sem

NOTE: sums important in all the units. Don’t leave the sums.

UNIT 1

1. Coordinate systems.
2. Electric field intensity due to circular disc.
3. Electric field intensity due to uniformly charged sheet.
4. Stokes and divergence theorem.
5. State and prove gauss law.
6. Expression for potential due electric dipole at any point P and also find electric field intensity.

1st unit sums very important, so learn all the sums…

UNIT 2

1. State and prove Amperes circuital law. Use amperes circuital law to derive H for coaxial cable.
2. Expression for H due to long straight conductor.
3. Expression for H due to circular wire.
4. Expression for magnetic scalar and vector potential.
5. Bio-Savart law- derive magnetic field intensity on the axis of coaxial cable.
6. Expression for torque on closed rectangular loop.

Imp sums: find max torque.

UNIT 3

1. Poisson and Laplace equation.
2. Expression for inductance of solenoid.
3. Expression for inductance of toroidal.
4. Boundary condition between 2 magnetic medias.
5. Boundary condition between 2 dielectric medias.
6. Continuity equation

Imp sums: calculate inner and outer inductance of solenoid, Laplace sums.

UNIT 4

1. Modified amperes circuital law in differential and integral form.
2. Maxwell’s faradays law in integral and point form.
3. List Maxwell’s equations in integral and point form.
4. Pointing power, average power and instantaneous power.
5. State and prove pointing theorem.
6. Expression for total power flow in coaxial cable.
7. Expression for displacement current density.
8. Motional enf and transformer emf.

Imp sums: find total power passing through disc.

UNIT 5

1. Electromagnetic wave equation in conducting medium for electric and magnetic fields from Maxwell’s equation.
2. Al types of polarization of uniform plane waves.
3. Expression for reflection of plane waves by perfect dielectrics.
4. Discuss wave motion in good conductor.
5. General wave equation.

Sums very important….

Note: Qstns will be twisted, read it many times, it will be the studied one..

ALL the best…..