131. Short-circuited stubs are preferred to open-circuited stubs because the latter are—

1. 1. More difficult to make and connect

   
   
   

   2. Made of a transmission line with a different characteristic impedance

   
   
   

   3. Liable to radiate

   
   
   

   4. Incapable of giving a full range of reactances

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

---

132. Impedance inversion may be obtained with—

1. 1. A short-circuited stub

   
   
   

   2. An open-circuited stub

   
   
   

   3. A quarter-wave line

   
   
   

   4. A half-wave line

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Impedance inversion may be obtained with a quarter-wave line

   Correct Option: C

   Impedance inversion may be obtained with a quarter-wave line

---

---

133. The velocity factor of a transmission line—

1. 1. Depends on the dielectric constant of the material used

   
   
   

   2. Increases the velocity along the transmission line

   
   
   

   3. Is governed by the skin effect

   
   
   

   4. Is higher for a solid dielectric than for air
      

   
   
   

---

1. View Hint View Answer Discuss in Forum

   The velocity factor of a transmission line depends on the dielectric constant of the material used.
   

   Correct Option: A

   The velocity factor of a transmission line depends on the dielectric constant of the material used.
   

---

134. A (75 – j50)-Ω load is connected to a coaxial transmission line of Z0 = 75Ω. at 10 GHz. The best method of matching consists in connecting—

1. 1. A short-circuited stub at the load

   
   
   

   2. An inductance at the load

   
   
   

   3. A capacitance at some specific distance from the load

   
   
   

   4. A short-circuited stub at some specific distance from the load

   
   
   

---

1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

---

---

135. A plane wave is characterized by
     
     

     →		⋅	⋅
     E =	(0.5	x +	y	Ejπ/2)	ejωt– jkz

     
     This wave is—

1. 1. Linearly polarized

   
   
   

   2. Circularly polarized

   
   
   

   3. Elliptically polarized

   
   
   

   4. Unpolarized

   
   
   

---

1. View Hint View Answer Discuss in Forum

   Elliptically polarized as X and Y components have different magnitudes and are not in same phase.

   Correct Option: C

   Elliptically polarized as X and Y components have different magnitudes and are not in same phase.

---