Q1:

An antenna in free space receives $2\mu W$ of power when the incident electric field is 20$mV/mrms.$The effective aperture of the antenna is

Q2:

A dipole with a length of 1.5 m operates at 100 MHz while the other has a length of 15m and operates at 100 MHz. The dipoles are fed with same current. The power radiated by the two antennas will be

Q3:

Two dentinal and parallel dipole antennas are kept apart by a distance of $\lambda$in $\overrightarrow{H}$ plane they are fed with equal current but the right most antenna has a phase shift of +${90}^{\cdot }$the radiation pattern is given as

Q4:

The bound charge density and free charge density are 12 and 6 units respectively. Calculate the susceptibility.

Q5:

Find the mean free path of an electron travelling at a speed of 18m/s in 2 seconds.

Q6:

By method of images, the problem can be easily calculated by replacing the boundary with which polygon?

Q7:

Compute the capacitance between two concentric shells of inner radius 2m and the outer radius is infinitely large.

Q8:

If a very flexible wire is laid out in the shape of a hairpin with its 2 ends secured. What shape will the wire tend to assume if current is passed through it?

Q9:

Path of a charged particle A that enters in a uniform magnetic field B (pointing into the page) is shown.

The deflection in the path of particles shows that the particles is

Q10:

A rectangular coil of area 1m ² carrying current of 5A lies in plane 2x + 6y – 3z = 4 such that magnetic moment is directed away from origin. If the coil is surrounded by a uniform magnetic field $\beta$= 6a_x + 4a_y + 5a_z wb/m², then torque of coil will be:  

Q11:

A non-uniform magnetic field B inside a medium with X_m= 2 is given as B = 4za_x Tesla.

Bound current density insides the medium will be

Q12:

Two small resistor of 25or each is connected through a perfectly conducting filament such that it forms a square loop lying in x-y plane as shown in the figure. Magnetic flux density passing through the loop is given as; B = -7.5COS(120$\pi$t – 30⁰) az

The induced current I(+) in the loop will be

Q13:

Electric flux density in a medium ($\epsilon$r = 10, ulr = 2) is given as

D = 1.33sin$\left(3\times {10}^{8}t-0.2x\right)ayuc/m^2$

Magnetic field intensity in the medium will be

Q14:

In a non-conducting medium (r = 0, ulr =$\epsilon r$=1), the retarded potentials are given as v = y(x ÷ ct) volt and A = y (I/c – t) a = wb/m where c is velocity of waves in free space. The field (electric and magnetic) inside the medium satisfies Maxwell’s equation if

Q15:

Refractive Molex of glass is 1.5. find the wavelength of beam of light inch frequency of 10${}^{14}$Hz in glass

Q16:

For a short circuit coaxial transmission line characteristic impedance Z₀ = 35 + j49$\Omega$ propagation constant $\gamma$= 1.4 + j5m^–1, length of line l = 0.4m. The input impedance of short circuit line is  

Q17:

Calculate the group wavelength of a wave, given that group phase constant to 6.28 units

Q18:

The electric field component of a time harmonic plane EM wave travelling in a non-magical lossless dielectric meduri has an amplelrds $v/n$. If the relative permittivity of medium is 4 than magnitude of time-average power density vector (in w/m) is

Q19:

The ampletivds of a wave travelling through a loss non-magnetic medium reduces by 18% every meter the wave operates at 10 MHz and the daric filed magnetic-filed by ${24}^{\cdot }$ the propagation constant is

Q20:

Find the group velocity of a wave whose phase velocity is 60 × 10⁹?