Electronics and Communication Engineering - Electromagnetic Field Theory
Exercise : Electromagnetic Field Theory - Section 1
- Electromagnetic Field Theory - Section 1
- Electromagnetic Field Theory - Section 2
- Electromagnetic Field Theory - Section 3
- Electromagnetic Field Theory - Section 4
- Electromagnetic Field Theory - Section 5
- Electromagnetic Field Theory - Section 6
- Electromagnetic Field Theory - Section 7
- Electromagnetic Field Theory - Section 8
- Electromagnetic Field Theory - Section 9
- Electromagnetic Field Theory - Section 10
- Electromagnetic Field Theory - Section 11
- Electromagnetic Field Theory - Section 12
- Electromagnetic Field Theory - Section 13
1.
ZL = 200 Ω and it is desired that Zi = 50 Ω The quarter wave transformer should have a characteristic impedance of
Answer: Option
Explanation:
Z0 = Zi . ZL
2.
A broadside array consisting of 200 cm wavelength with 10 half-wave dipole spacing 10 cm. And if each array element feeding with 1 amp. current and operating at same frequency then find the half power beamwidth
Answer: Option
Explanation:
.
3.
Refractive index of glass is 1.5. Find the wavelength of a beam of light with a frequency of 1014 Hz in glass. Assume velocity of light is 3 x 108 m/sec in vacuum.
Answer: Option
Explanation:
Given, μ = 1.6, f = 1014 Hz, v = 3 x 108 m/sec.
4.
The function f(x - vot) represent which of the following?
Answer: Option
Explanation:
f(x - vot) represents in +ve direction while f(x + vot) represents a progressive wave in -ve direction.
5.
A broadside array operating at 100 cm wavelength consist of 4 half-wave dipoles spaced 50 cm apart. Each element carries radio frequency current in the same phase and of magnitude 0.5 A. The radiated power will be
Answer: Option
Explanation:
P = n . I2 . Rr, where Rr = 80p2 Ω.
n = 4.
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