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 If a right hand circularly polarised wave is incident on a perfect conductor. The reflected wave is : a. Right circularly polarised wave b. Left circularly polarised wave c. Linear polarised wave d. None of above

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asked Jun 18, 2018 in Electronics Engineering by Shimroz123
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The EM wave which does not propagate through a rectangular waveguide with a=30 mm & b=15 mm is : a. EM wave of frequency 4.5 GHz b. EM wave of frequency 5.5 GHz c. EM wave of frequency 50 GHz d. EM wave of frequency 300 GHz

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The phase velocity of wave propagating in a hollow metal wave guide is:  (1) Greater than the velocity of the light in free space (2) Less than the velocity of the light in free space (3) Equal to the velocity of the light in free space (4) Equal to the group velocity

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
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The dominant mode in a rectangular wave guide is TEo, because this mode has  a. No attenuation  b. No cut off   c. No magnetic field component  d. The highest cut—off wavelength

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
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When a sinusoidal voltage wave drives a Schmitt Trigger, the output is a:  A) Triangular wave B) Rectified sine wave C) Rectangular wave D) Trapezoidal wave

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
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The size of a conductor used in power cables depends on the:  (A) operating voltage  (C) current to be carried (B) power factor (D) type of insulation used

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If Voltage Standing Wave Ratio, (VSWR) of a wave is 2, its reflection coefficient will be _____.

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If a transformer primary is energised from a square wave voltage source, its output voltage will be a:  (A) square wave (B) sine wave (C) triangular wave (D) pulse wave

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A travelling wave of surge resistance, Ro on a transmission line is terminated by a load resistance, RL. If RL > Ro then there is (A) no reflected wave (B) partial reflection of reversal of current only (C) partial reflection of reversal of voltage only (D) reflection of reversal of both current and voltage

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