EMT (Transmission Lines - 1)

• 2.46 m

• 17.46 m

• 32.46 m

• 62.46 m

• 2.65

• 3.65

• 4.65

• 5.65

On a  lossless transmission line, the following observations were noted:

·       Distance of the first voltage minimum from the load = 3 cm

·       Distance of the first voltage maximum from the load = 9 cm

·       Standing wave ratio on the line is 3.

Based on above the load impedance connected to the transmission line is ______.

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A 50-Ω lossless line terminated in a purely resistive load has a voltage standing-wave ratio of 3. Which of the following is/are the possible load impedances connected to the given line?

• 16.67 ohm

• 60 ohm 

• 120 ohm

• 150 ohm

A complete clockwise revolution (360°) around the Smith chart represents

• moving towards the generator with a distance of λ/4

• moving towards the load with a distance of λ/4

• moving towards the generator with a distance of λ/2

• moving towards the load with a distance of λ/2

A 120 Ω load is matched to a 75 Ω line by using a quarter wave transformer, then the characteristic impedance (rounded to the nearest integer) of quarter wave transformer is ____ohm

• 90

• 95

• 100

• 105

A coaxial cable of unknown length is short-circuited on one end and the impedance on the other end is measured to be 100 Ω. The measured impedance when it is open-circuited is 25 Ω. Then the characteristic impedance of the line is

• 25 Ω

• 50 Ω

• 75 Ω

• 100 Ω

• 100 Ω

• 200 Ω

• 300 Ω

• 400 Ω

• 100 μH/m

• 50 μH/m

• 25 μH/m

• 4 μH/m

• 2 x 10⁸ m/s

• 2.45 x 10⁸ m/s

• 3 x 10⁸ m/s

• 4.58 x 10⁸ m/s