# If a function f(t) is shifted by ‘a’, then it is correctly represented as

1.  f(t-a) U(t)

2.  f(t) U(t-a)

3.  f(t-a) U(t-a)

4.  f(t-a) (i-a)

4

f(t-a) U(t-a)

Explanation :
No Explanation available for this question

# The measure of mismatch between the load and the transmission line is known as

1.  Directivity

2.  I-Gain

3.  Standing wave ratio

4.  Reflection coefficient

4

Reflection coefficient

Explanation :
No Explanation available for this question

# In a R-L-C series resonant circuit at the half power points

1.  the current it half of the current at response

2.  the impedance is half the impedance at resonance

3.  the resistance is equal to the resultant reactance

4.  none of these

4

the resistance is equal to the resultant reactance

Explanation :
No Explanation available for this question

# High frequencies transmission line is

1.  Coaxial cable

2.  Open wire

4.  All of the above

4

All of the above

Explanation :
No Explanation available for this question

# A two-part network is reciprocal if and only if

1.  Z11 = Z22

3.  Y12 = -Y21

4.  h12 = h21

4

Explanation :
No Explanation available for this question

# A two terminal black box contains an element which can be R, L, C or M. as soon as the black box is connected to a dc voltage source, a finite non-zero current is observed to flow through the element. The element is

1.  a resistance

2.  an inductance

3.  a capacitance

4.  a mutual inductance

4

a resistance

Explanation :
No Explanation available for this question

# Term does not apply to the Yagi-Uda is

1.  High gain

2.  Folded dipole

3.  Parasitic elements

4.  Good bandwidth

4

High gain

Explanation :
No Explanation available for this question

# High frequency transmission line is

1.  An impedance transformer

2.  Frequency compensator

3.  Flying resistor

4.  None of the above

4

An impedance transformer

Explanation :
No Explanation available for this question

# The two windings of a transformer have an inductance of 2 Henrys each. If the mutual inductance between them is also 2 Henrys, then

1.  the transformer is an ideal transformer.

2.  the turns ratio of the transformer is also two

3.  it is a perfect transformer

4.  none of these

4

it is a perfect transformer

Explanation :
No Explanation available for this question

# For transmission-line matching over range of frequencies it is best to use a

1.  Single stub of adjustable position.

2.   Double stub

4.  None of these

4