# In series Laplace values of R, L and C are 25, 0.04 H and 0.01 Μf. The frequency at which voltage across L will be maximum at

1.  7.96 KHz

2.  8 KHz

3.  7.9 KHz

4.  8.3 KHz

4

8 KHz

Explanation :
No Explanation available for this question

# The relative permittivity of the ionosphere at radio frequencies

1.  More than 1

2.  Less than 1

3.  1

4.  Negligible

4

Less than 1

Explanation :
No Explanation available for this question

# The Fourier series expansion of a periodic function with half-wave symmetry contains only

1.  sine terms

2.  cosine terms

3.  odd harmonics

4.  even harmonics

4

odd harmonics

Explanation :
No Explanation available for this question

# The gain of an antenna with a circular aperture of diameter 3 metres at a frequency of 5 GHz

1.  2.4674

2.  24.674

3.  246.74

4.   24674

4

24674

Explanation :
No Explanation available for this question

# The beamwith produced by a circular aperture flat face reflector of diameter (D) is given as a function of wavelength (λ)by

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# Length of the half-wave dipole antenna meant to have correct half-wave length at 60 MHz will be

1.  1.25 m

2.  2.50 m

3.  5 m

4.  12.5 m

4

12.5 m

Explanation :
No Explanation available for this question

# The rms voltage measured across an admittance (G+Jb) is v. The reactive power for the element is

1.  V2B

2.  – V2B

3.

4.  V2(G + Jb)

4

V2B

Explanation :
No Explanation available for this question

# If the polarization ellipse of two electro-magnetic fields have same axial ratio and opposite senses of rotation and if their major axes are at right angels, they are said to have

1.  Parallel polarization

2.  Orthogonal polarization

3.  Linear polarisation

4.  Circular polarization

4

Orthogonal polarization

Explanation :
No Explanation available for this question

# The loss resistance of an antenna is constituted by

1.  Dielectric loss

2.  Lekage loss in insulation

3.   Loss in earth connections

4.  All of the above

4

All of the above

Explanation :
No Explanation available for this question

1.  f(t)

2.  δ(t)

3.  f(0) δ(t)

4.  f(t) δ(t)

4