Electromagnetic-theory Questions Set 74:
Calculate the critical angle for two media with permittivity of 9 and 4.8 respectively.
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What is the beamwidth between nulls of a 4-element broadside array with half-wave dipoles (in degrees)?
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Calculate the critical angle for two media which have permittivity of 12 and 6.5 respectively.
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The opposition to the flow of magnetic flux in a magnetic material is called
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Calculate the electrical length for a frequency of 10 kHz, given the physical length is 1 cm.
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Ward-Leonard control is basically a
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A cavity resonator is
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At the instant of starting, when a D.C. motor is put on supply, it behaves like
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If the terminals of the armature of a DC motor are interchanged, this action will result in the following kind of braking:
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Choose the option that accurately comments on the given statement:
"Normal components of the electric flux density are continuous across the charge-free interface between the two dielectrics."
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