# Test: Transmission Lines- 1

## 10 Questions MCQ Test Topicwise Question Bank for Electronics Engineering | Test: Transmission Lines- 1

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Attempt Test: Transmission Lines- 1 | 10 questions in 30 minutes | Mock test for Electronics and Communication Engineering (ECE) preparation | Free important questions MCQ to study Topicwise Question Bank for Electronics Engineering for Electronics and Communication Engineering (ECE) Exam | Download free PDF with solutions
QUESTION: 1

### For a reciprocal transmission line, the three transmission parameters are given by A = 4, B = 7 and C = 5. The value of D is equal to

Solution:

Since the transmission line is reciprocal, therefore,

QUESTION: 2

Solution:
QUESTION: 3

### In a transmission line terminated by characteristic impedance, Z0

Solution:

When a transmission line is terminated by an impedance Z, then reflection coefficient are:

Here, Z0 = Characteristic impedance of transmission line.
Since Z = Z0 therefore reflection co-efficient of voltage (pv) and current (pI) both will be zero, i.e there will be no reflection of incident wave.

QUESTION: 4

A symmetrical two-part network have

Solution:
QUESTION: 5

A pure resistance, RL when connected at the load end of a loss-less 100 Ω line produces a VSWR of 2. The RL would be

Solution:

QUESTION: 6

The reflection coefficient of a transmission line with a short-circuited load is

Solution:

reflection coefficient of voltage

and reflection coefficient of current,

Here, only option (b) matches the answer

QUESTION: 7

'The characteristic impedance Z0 of a transmission line is given by (where R, L, G, C are the unit length parameters)

Solution:

The characteristic impedance (Z0) of a transmission line is given by

QUESTION: 8

The standing wave ratio (VSWR) in terms of reflection coefficient ρ is given by

Solution:
QUESTION: 9

If a transmission line of length less than λ/4  is short circuited, it behaves as

Solution:
QUESTION: 10

A line becomes distortionless

Solution:

A distortionless transmission line is one in which the attenuation constant α is independent of frequency while the phase.constant β is linearly dependent on frequency.

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