Q.1
##### Copper behaves as a
• a) Conductor always
• b) Conductor or dielectric depending on the applied electric field strength
• c) Conductor or dielectric depending on the frequency
• d) Conductor or dielectric depending on the electric current density
Q.2
##### In a good conductor the phase relation between the tangential components of electric E and the magnetic field H is as follows
• a) E and H are in phase
• b) E and H are out of phase
• c) H leads E by 90
• d) E leads H by 45
Q.3
##### For an electromagnetic wave incident from one medium to a second medium, total internal reflection takes place when
• a) Angle of incidence is equal to the Brewster angle with E field perpendicular to the plane of incidence
• b) Angle of incidence is equal to the Brewster angle with E field parallel to the plane of incidence
• c) Angle of incidence is equal to the critical angle with the wave moving from the denser to rarer medium
• d) Angle of incidence is equal to the critical angle with the wave moving from the rarer to denser medium
Q.4
• a) 70.7
• b) 50
• c) 100
• d) Infinity
Q.5
##### In an impedance Smith chart , a clockwise movement along a constant resistance circle gives rise to
• a) Decrease in reactance
• b) Increase in reactance
• c) No change in reactance
• d) No change in impedance
Q.6
• a) RL = 1/GC
• b) RL = GC
• c) LG = RC
• d) RG = LC
Q.7
• a) 0
• b) 0.02
• c) Infinity
• d) 50
Q.8
• a) ZC
• b) 1/ZC
• c) Z/C
• d) C/Z
Q.9
• a) 5 cm
• b) 2.5 cm
• c) 10 cm
• d) 1.25 cm
Q.10
##### One end of a lossless transmission line having the characteristic impedance ofohm and length of 1 cm is short circuited. At 3 GHz, the input impedance at the other end of the transmission line is
• a) 0
• b) Resistive
• c) Inductive
• d) Capacitive