1) A lossless transmission line of length 50cm with L-10µH/m, C-40 pF/m is operated at 30MHz. Its electrical length is: a) 202 b) 0.22 c) 108⁰ d) 40m e) None of the mentioned

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1) A lossless transmission line of length 50cm with L-10µH/m, C=40 pF/m is operated at
30MHz. Its electrical length is:
a) 202 b) 0.22 c) 108⁰ d) 40m
e) None of the mentioned
2) In an air line, adjacent maxima are found at 12.5cm and 37.5cm. The operating frequency
is:
a)
1.5GHz b)600 MHz c) 300 MHz d) 1.2GHz
3) Which of the following conditions will not guarantee a distortionless transmission line?
a) R=G=0 b) RC-GL c) Very low frequency range (R>>wL, G>> wC) d) Very
high frequency range (R<< wL, G<<wC)
4) An evanescent mode occurs when:
a) a wave is attenuated rather than propagated.
b) the propagation constant is imaginary.
c) m=n=0 so that all field components vanish.
d) the wave frequency is the same as the cutoff frequency.
5) The TM10 mode can exist in rectangular waveguides.
True / b) False
a)
6) For TE30 mode, which of the following field components exist?
a) Ex b) Ey c)Ez d)Hx e)Hy
7)If in a rectangular waveguide for which a=2b, the cutoff frequency for TE02 mode is
12GHz, then the cutoff frequency for TM₁1 mode is
a)3GHz b)3√5 GHz c)12GHz d) 6√5 e) None of the mentioned
8)The equation E₂ (r, Ø) = C Jn (hr) cos(nø) represents the general solution of TM
propagating wave along the z-axis in:
rectangular waveguide b) circular waveguide c) parallel-plate waveguide
none of the mentioned
a)
b)
9) Which of the following is not possible in a circular wave guide?
a) TE10 b) TE01 c) TE11 d) TE12
10)The dominant mode for rectangular waveguides is:
(a) TE11
(b) TM11 (c) TE101 (d) TE10
Transcribed Image Text:1) A lossless transmission line of length 50cm with L-10µH/m, C=40 pF/m is operated at 30MHz. Its electrical length is: a) 202 b) 0.22 c) 108⁰ d) 40m e) None of the mentioned 2) In an air line, adjacent maxima are found at 12.5cm and 37.5cm. The operating frequency is: a) 1.5GHz b)600 MHz c) 300 MHz d) 1.2GHz 3) Which of the following conditions will not guarantee a distortionless transmission line? a) R=G=0 b) RC-GL c) Very low frequency range (R>>wL, G>> wC) d) Very high frequency range (R<< wL, G<<wC) 4) An evanescent mode occurs when: a) a wave is attenuated rather than propagated. b) the propagation constant is imaginary. c) m=n=0 so that all field components vanish. d) the wave frequency is the same as the cutoff frequency. 5) The TM10 mode can exist in rectangular waveguides. True / b) False a) 6) For TE30 mode, which of the following field components exist? a) Ex b) Ey c)Ez d)Hx e)Hy 7)If in a rectangular waveguide for which a=2b, the cutoff frequency for TE02 mode is 12GHz, then the cutoff frequency for TM₁1 mode is a)3GHz b)3√5 GHz c)12GHz d) 6√5 e) None of the mentioned 8)The equation E₂ (r, Ø) = C Jn (hr) cos(nø) represents the general solution of TM propagating wave along the z-axis in: rectangular waveguide b) circular waveguide c) parallel-plate waveguide none of the mentioned a) b) 9) Which of the following is not possible in a circular wave guide? a) TE10 b) TE01 c) TE11 d) TE12 10)The dominant mode for rectangular waveguides is: (a) TE11 (b) TM11 (c) TE101 (d) TE10
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