Gujarat Technological University 2011-7th Sem B.E Electrical Engineering Theory of electromagnetic, - Question Paper

* Gujarat Technological university
*Theory of electromagnetic
* 2011

Q-1(a) Let every of the vectors A=5ax-ay+3az,B=-2ax+2ay+4az and C=3ay-4az
extend outward from the origin of a cartesian coordinate system to points A,B,C respectively . obtain a unit vector directed from point A toward: (a)to the
origin;(b) point B; (c) appoint equidistance from B & C on the line BC; (d)Find the length of perimeter of the triangleABC. [Mark 07]


(b)Given points A(x=2,y=3,z=-1) and B(rho=4,phi=-50,z=2) obtain a unit vector in cylindrical coordinates at points B directed towards point A.[Mark 07]

Q-2(a) describe electric field intensity.Obtain expression for the electric fieldintensity at a point which is at a point which is at a distance of R from a point charge Q.[Mark 07]
(b) obtain the charge inside a quantity having quantity charge density as 10Z^2*e^-0.1x sin(pi)y c/m^3. The quantity is described ranging from -
-2<=x<=2,0<=y<=1 and 3<=z<=4.[Mark 07]
*OR*
(b) A uniform line charge, infinite in extent with raw(l)=20nc/m lies along the z axis. obtain the E at (6,8,3)m.


Q-3(a) State and prove the gauss legal regulations. Also state the conditions to be satisfied by the special Gaussian surface. [Mark 07]
(b) Derive Maxwell's 1st formula as applied to the electronics , using GAuss's legal regulations. Also state the divergence theorem.[Mark 07]
*OR*
(a) discuss an electric dipole. Also derive expression of E due to an elecric dipole.
(b) An electric potential is provided by,
V=60sinx/r62volt. obtain V and E at P(3, 60',25')

Q-4(a) Shortnote: Electrostatic boundary condition ranging from perfect dielectrics.[Mark 07]
(b) Derive poiss's and Laplace's formula.[Mark 07]
*OR*
(a) State & discuss Bio-savart's legal regulations.
(b) Shortnote: Stoke's theorem.

Q-5(a) Derive Lorentz force formula.[Mark 07]
(b) Shortnote: ferrite core. List different properties of identical.[Mark 07]
*OR*
(a) State Maxwell's formula in point form and discuss physical importance of the equations.
(b) discuss briefly finite element method. Also state the merit and demerit of finite element method.

Earning:   Approval pending.