Electromagnetic theory miscellaneous
- The dominant mode in a rectangular waveguide is TE10 because this mode has—
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For the dominant mode either cut-off frequency should be lowest or cut-off wavelength should be highest.
Correct Option: D
For the dominant mode either cut-off frequency should be lowest or cut-off wavelength should be highest.
- The phase velocity of wave propagating in a hollow metal waveguide is—
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Explained in the synopsis provided.
Correct Option: A
Explained in the synopsis provided.
- If a plane electromagnetic wave satisfies the equation
∂2Ex = e2 ∂2Ex ∂z2 ∂t2
the wave propagates in—
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For the propagation of plane electromagnetic wave their is change in the intensity (magnitude) of wave in the direction of propagation with the time.
Correct Option: B
For the propagation of plane electromagnetic wave their is change in the intensity (magnitude) of wave in the direction of propagation with the time.
- A transmission line is distortionless if—
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It is explained in the synopsis that for distortionless transmission imaginary part should be zero.
R = L G C Correct Option: D
It is explained in the synopsis that for distortionless transmission imaginary part should be zero.
R = L G C
- Two coaxial cables 1 and 2 are filled with different dielectric constants εr1 and εr2 respectively the ratio of the wavelengths in the two cables λ1/λ2 is—
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Ratio of their wavelength will be
λ1 = v1 = 1/√μ1ε1 λ2 v2 1/√μ2ε2
⇒√μ2ε2 = √μ0ε0εr2 = √ εr2 √μ1ε1 √μ0ε
0εr1εr1 Correct Option: B
Ratio of their wavelength will be
λ1 = v1 = 1/√μ1ε1 λ2 v2 1/√μ2ε2
⇒√μ2ε2 = √μ0ε0εr2 = √ εr2 √μ1ε1 √μ0ε
0εr1εr1
