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GATE EC 2020: Electromagnetic Theory Quiz 8

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Question 1

A transmission line has a characteristic impedance of 50 Ω and a resistance of 0.1 Ω /m. if the line is distortion less, the attenuation constant (in Np/m) is

Question 2

A transmission line of characteristic impedance 50 Ω is terminated in a load impedance ZL. The VSWR of the line is measured as 5 and the first of the voltage maxima in the line is observed at a distance of λ/4 from the load. The value of ZL is

Question 3

A transmission line with a characteristic impedance of 100 Ω is used to match a 50 Ω section to a 200 Ω section. If the matching is to be done both at 429 MHz and 1 GHz. the length of the transmission line can be approximately

Question 4

One of a loss-less transmission line having the Characteristic Impedance of 75Ω and length of 1cm is short-circuited. At 3GHz, the input impedance at the other end of the transmission line is

Question 5

Consider a 300Ω quarter-wave long (at 1 GHz) transmission line as shown in Figure. It is connected to a 10V, 50Ωsources at one end and is left open circuited at the other end. The magnitude of the voltage at the open circuit end of the line is
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Question 6

A transmission line has characteristic impedance of 100Ω and phase constant β = 1rad/m. The inductance per unit length, when the transmission line operates at 2 GHz is
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Oct 30ESE & GATE EC