Question is ⇒ The effective height of an antenna is slightly greater than physical height because, Options are ⇒ (A) wave velocity in conductor is less than its velocity in free space, (B) wave velocity in conductor is more than its velocity in free space, (C) resistance of conductor is less than that of free space, (D) none of the above, (E) , Leave your comments or Download question paper.

Question is ⇒ The effective height of an antenna is slightly greater than physical height because, Options are ⇒ (A) wave velocity in conductor is less than its velocity in free space, (B) wave velocity in conductor is more than its velocity in free space, (C) resistance of conductor is less than that of free space, (D) none of the above, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The effective height of an antenna is slightly greater than physical height because
A.	wave velocity in conductor is less than its velocity in free space [Correct Answer]
B.	wave velocity in conductor is more than its velocity in free space [Wrong Answer]
C.	resistance of conductor is less than that of free space [Wrong Answer]
D.	none of the above [Wrong Answer]
View Answer 2 -1 Explanation:- Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ M circles are symmetrical with respect to
real and imaginary axis
M = 1 straight line and real axis
M = 1 straight line and imaginary axis
M = 1 straight line

⇒ A 10 bit D/A converter gives a maximum output of 10.23 V. The resolution is
10 mV
20 mV
15 mV
25 mV

⇒ As a compared to a CB amplifier, a CE amplifier has
lower current amplification
higher current amplification
lower input resistance
higher input resistance

⇒ In amplitude modulation, the magnitude of side bands is
ma/2 times the carrier amplitude, E_c
ma times the carrier amplitude, E_c
2ma times the carrier amplitude, E_c
4ma times the carrier amplitude, E_c

⇒ A TV remote control works on the principle of
pulse code modulated ultra violet light
pulse code modulated infrared light
demodulation
either (a) or (b)

⇒ The power dissipation in a transistor is the product of
emitter current and emitter to base voltage
emitter current and collector to emitter voltage
collector current and collector to emitter voltage
none of the above

⇒ In a Vidicon camera tube
grid G₁ accelerates electrons
grid G₂ accelerates electrons and grid G₃, slows down electrons
grid G₃ accelerates electrons and grid G₂ slows down electrons
both grids G₂ and G₃ accelerate electrons

⇒ In a radio receiver, the local oscillator is tuned to a frequency
lower than the incoming frequency
higher than the incoming frequency
equal to incoming frequency
any of the above

⇒ Three point tracking can be achieved with
gang condenser
variable selectivity
paddar capacitor
any of the above

⇒ If E is energy level of electron and E_F is Fermi level, then
all quantum states with E less than E_F will be occupied at T = 0
all quantum states with E less than E_F will be empty at T = 0
some quantum states with E less than E_F will be occupied at T = 0
none of the above

⇒ For measuring temperatures below 800°C with high accuracy, the best instrument is
optical pyrometer
thermistor based thermometer
GaAs junction diode thermometer
platinum resistance thermometer

⇒ An LED has a rating of 2 V and 10 mA. It is used along with 6V battery. The range of series resistance is
0 to 200 Ω
200 - 400 Ω
200 Ω and above
400 Ω and above

⇒ The V_TH at terminals A and B is equa
0 V
5 V
-5 V
none

⇒ Which of these has the highest dielectric strength?
Mica
Air
Cotton
Rubber

⇒ Carbon steel has a residual flux density of 1 Wb/m².
TRUE
FALSE

⇒ In a transistor leakage current mainly depends on
doping of base
size of emitter
rating of transistor
temperature

⇒ Network transients are due to
circuit resistance
circuit voltage
changes in energy stored in L and C
circuit admittance

⇒ The circuit show
voltage series feedback amplifier
transconductance amplifier
transresistance amplifier with open circuit mutual resistance R_F
transresistance amplifier with short circuit mutual resistance R_F

⇒ In a bipolar junction transistor a_dc = 0.98, I_CO= 2 μA and 1_B = 15 μA. The collector current I_C is
635 mA
735 mA
835 mA
935 mA

⇒ A receiver having an RF amplifier and an IF of 450 kHz, has Q of the coils 65 and an incoming frequency of 1200 kHz. The image rejection of the receiver is
5870
3655
236
13.3

⇒ For exponential function e^-at the Laplace transform 1/(s - a)
TRUE
FALSE

⇒ Image frequency rejection mainly depends upon
detector
mixer
IF
RF

⇒ If P = 250 W and p.f. = 0.707 lagging, Q =
250 vars
- 250 vars
176.7 vars
- 176.75 vars

⇒ In an RC series circuit excited by dc voltage E, the current at t = 0 is
E/R
E/C
zero
infinity

⇒ What will happen to a bird sitting on a conductor?
It will die of shock
It will not die of shock because its claws are insulated
It will not die because it is insulated from earth and other conductors
None of the above

⇒ The average noise temperature of Earth, as viewed from space, is __________ °K.
254
303
100
500

⇒ In a pure sample of silicon
the number of holes and free electrons is always equal
the number of free electrons is more than the number of holes
the number of free electrons and holes is equal at low temperature
the number of free electrons is less than number of holes

⇒ Consider z transform of a signal as given b
IIR
FIR
Depends on value of n
Cannot determined

⇒ A voltage tripler circuit uses
2 diodes and 2 capacitors
3 diodes and 3 capacitors
2 diodes and 3 capacitors
3 diodes and 2 capacitors

⇒ The total field developed by an antenna array at a distant point is
phasor sum of fields produced by individual antennas of the array
algebraic sum of fields produced by individual antennas of the array
either (a) or (b) depending on type of array
neither (a) nor (b)