Question is ⇒ For a short dipole having an effective length less than half the wavelength the radiation resistance is, Options are ⇒ (A) proportional to length, (B) proportional to square root of length, (C) proportional to square of length, (D) none of the above, (E) , Leave your comments or Download question paper.

Question is ⇒ For a short dipole having an effective length less than half the wavelength the radiation resistance is, Options are ⇒ (A) proportional to length, (B) proportional to square root of length, (C) proportional to square of length, (D) none of the above, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	For a short dipole having an effective length less than half the wavelength the radiation resistance is
A.	proportional to length [Correct Answer]
B.	proportional to square root of length [Wrong Answer]
C.	proportional to square of length [Wrong Answer]
D.	none of the above [Wrong Answer]
View Answer 1 -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 :

⇒ Which of the following is used for generating time varying wave forms?
MOSFET
PIN diode
Tunnel diode
UJT

⇒ If a two-port network is reciprocal as well as symmetrical, which one of the following relationships is correct?
Z₁₂ = Z₂₁ and Z₁₁ = Z₂₂
Y₁₂ - Y₂₁ and Y₁₁ - Y₂₂
AD - BC = 1 and A = D
all of the above

⇒ Sulphur hexafluoride is used in
transformers
generators
relays
circuit breakers

⇒ CMRR of an op-amp is about 0.1.
TRUE
FALSE

⇒ A two branch parallel tuned circuits has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. The bandwidth is 200 radians/sec. A load of resistance R_L is connected in parallel. The new bandwidth will be
200 rad/sec
more than 200 rad/sec
less than 200 rad/sec
200 rad/sec or less

⇒ The parameter β of a BJT change by 300%. If self bias is used in the amplifier using this BJT, the quiescent value of I_C and V_CE remain almost the same.
TRUE
FALSE

⇒ If V = 4 in the figure, the value of I_s is give
0.25
5/2 A
0
none

⇒ A moving iron instrument can be used for dc as well as ac.
TRUE
FALSE

⇒ 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

⇒ If E_b is the potential of accelerating anode, the energy of electrons as they emerge from electron gun is proportional to
E_b
E_b
E_b^1.5
E_b²

⇒ Consider the following statements as regards IF in radio receivers

If IF is too high, poor selectivity and poor adjacent channel rejection could result
If IF is high, tracking difficulties increase
A very low IF makes selectivity too sharp
As IF is decreased, image frequency rejection becomes better

Which of the above are correct?
1, 2, 3, 4
1, 2, 3
2, 3, 4
1, 3, 4

⇒

Assertion (A): Maxwell bridge is for measuring inductance of medium magnitude.

Reason (R): In Maxwell's bridge the unknown inductance is measured by comparing it with a capacitance.

Both A and R are true and R is correct explanation of A
Both A and R are true but R is not correct explanation of A
A is true R is false
A is false R is true

⇒ Two meters X and Y require 40 mA and 50 mA for full scale deflection. Then
X is more sensitive
Y is more sensitive
both are equally sensitive
it is not possible to determine from given data

⇒ Some words like READ, WRITE, STOP etc. cannot be used as variable names in Fortran 77.
TRUE
FALSE

⇒ In a transistor push pull amplifier
there is no dc present in the output
there are no even harmonics in the output
both (a) and (b)
neither (a) nor (b)

⇒ For input and later stages, BI-FET op-amp use
JFETs and MOSFETs respectively
MOSFETs and JFETs respectively
JFETs and BJTs respectively
BJTs and JFETs respectively

⇒ The action of bellows is similar to that of
mass
viscous friction
spring
none of the above

⇒ Two resistances are R₁ = 36 ± 5% and R₂ = 75 ± 5%. If they are connected in parallel, the limiting error in percent will be
0.05
0.1
0.15
0.2

⇒ Two capacitors each of capacitance C and breakdown voltage V are joined in series. The capacitance and breakdown voltage of the combination is
0.5 C and 2 V
0.5 C and 0.5 V
C and V
2 C and 2 V

⇒ The value of susceptibility in case of vacuum is taken as
zero
0.5
unity
infinity

⇒ Vidicon and plumbicon operate on the principle of
photo conduction
photo emission
photo voltaic
none of the above

⇒ An amplifier has open loop gain of 100, input impedance 1 kΩ and output impedance 100 Ω. If negative feedback with β = 0.99 is used, the new input and output impedances are
10 Ω and 1 Ω
10 Ω and 10 kΩ
100 kΩ and 1 Ω
100 kΩ and 10 Ω

⇒ Consider the resonant circuit as shown b
R = 10⁴ L = 5 μH C = 20 pF
1000 L = 50 μH C = 200 pF
10 K L = 50 μH C =20 pF
None of these

⇒ An image uses 512 x 512 picture elements. Each of the picture elements can take any of the 8 distinguishable intensity levels. The maximum entropy in the above image will be
2097152 bits
786432 bits
648 bits
144 bits

⇒ Which of the following should be used in order to prevent overloading or the last IF amplifier in a receiver?
Variable selectivity
Variable sensitivity
Double conversion
Squelch

⇒ In a series RLC circuit, the current at resonance is I₀ the total energy stored in the circuit at resonance is
LI₀²
2 LI₀²
2 LI₀²
0.5 LI²

⇒ Which of the following integer expressions is incorrect in Pascal?
L div M + P
A * * B
A div B - C
A mod B

⇒ As temperature increases
the forbidden energy gap in silicon and germanium increase
the forbidden energy gap in silicon and germanium decrease
the forbidden energy gap in silicon decreases while that in germanium decreases
the forbidden energy gap in silicon increases while that in germanium decreases

⇒ Binary 101010 is equivalent to decimal number
24
42
44
64

⇒ The pure capacitor connected across an A.C. voltage consumed 20 W. This is due to
the capacitive reactance in ohms
the current flowing in the capacitor
the fused capacitor was a big one
none of the above