Question is ⇒ The input impedance for a half dipole if radii of both the antenna is 4 and 8 meter respectively, Options are ⇒ (A) 600 Ω, (B) 100 Ω, (C) 657 Ω, (D) 650 Ω, (E) , Leave your comments or Download question paper.

Question is ⇒ The input impedance for a half dipole if radii of both the antenna is 4 and 8 meter respectively, Options are ⇒ (A) 600 Ω, (B) 100 Ω, (C) 657 Ω, (D) 650 Ω, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The input impedance for a half dipole if radii of both the antenna is 4 and 8 meter respectively
A.	600 Ω [Wrong Answer]
B.	100 Ω [Wrong Answer]
C.	657 Ω [Correct Answer]
D.	650 Ω [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : C 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 :

⇒ The terminals of a power MOSFET are called
emitter, base, collector
source, gate, drain
source, base, drain
emitter, gate, drain

⇒ The INTELSAT-IV satellite launched in 1974 had two earth coverage antenna and two narrower-angle antennas subtending 4.5°. The signal from narrow-angle antenna was stronger than that from earth- coverage antenna by a factor of
17.34/4.5
17.34 x 4.5
(17.34/4.5)²
(17.34/4.5)⁴

⇒ Ferromagnetic materials
shows spontaneous magnetisation below a certain temperature
have resistivity very high as compared to that of iron
can be used even at microwave frequencies
all of the above

⇒ The coefficients F_n in the exponential form of Fourier series are
independent of frequency
functions of frequency
even function of frequency
odd functions of frequency

⇒ Crompton potentiometer has
14 coils and a slide wire all having the same resistance
14 coils and a slide wire but the resistance of slide wire is half that of each coil
14 coils each of different resistance
14 coils out of which 7 coils have resistance which is twice that of remaining 7 coils

⇒ In frequency modulation noise can be further reduced by
increasing deviation
reducing deviation
reducing carrier frequency
increasing signal amplitude

⇒ A 4 bit transistor register has output voltage of high-low-high-low. The binary number stored and its decimal equivalent are
0101 and 5
0101 and 10
1010 and 5
1010 and 10

⇒ In 2's complement representation the number 11100101 represents the decimal number
37
-31
27
-27

⇒ For the system in the given figure, the gain margi
0
low
+ ∞
none of the above

⇒ An RL impedance function can also be realized as
RC impedance function
RC admittance function
LC impedance function
LC admittance function

⇒ A signal occupies a band 5 kHz to 10 kHz. For proper error free reconstruction at what rate it should be sampled?
10 kHz
20 kHz
5 kHz
(10 + 5) x 2 kHz

⇒ If e = 10 sin(10⁸ t + 3 sin 10⁴ t) then carrier frequency is
0.159 MHz
1.59 MHz
15.9 MHz
159 MHz

⇒

Assertion (A): In state space analysis, capacitors are taken to be in tree.

Reason (R): State variable analysis is very suitable for computer solution.

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

⇒ In a flip-flop with RS latch a high S and a low R set the output to __________ and a low S and a high R set the output __________ .
low, low
high, high
low, high
high, low

⇒ Monostable multivibrator is called one-shot or single-shot circuit because it
can be used once
can be used single and not with other circuits.
always returns by itself to its single stable state
changes to quasistable for a fixed period of time upon receipt of triggering signal.

⇒ In a single phase full wave ac regulator the firing angles during both half cycles are equal.
TRUE
FALSE

⇒ The bridge is balanced when the value of R is
50 Ω
100 Ω
200 Ω
250 Ω

⇒ The difference between resonant commutation and self commutation is
both these methods are based on entirely different principles
in resonant commutation, the commutating elements carry load current but in self commutation, the commutating elements do not carry load current
resonant commutation uses L and C but self commutation uses only capacitor
none of the above

⇒ A voltage V(t) which is a Gaussian ergodic random process with a mean of zero and a variance of 4 volt² is measured by a true rms meter. The reading will be
0
4
2
16

⇒ Multiplex techniques are used for
low density communications
low density point-to-point communications
high-density point-to-point communications
all of the above

⇒ VF glows with __________ colour when activated.
Red
Orange
Bluish green
none of these

⇒ When an electron rises through a potential of 100 V it will acquired an energy of
100 eV
100 Joules
100 ergs
100 x 10^-6 Newtons

⇒ In a two tone AM system the two modulating frequencies are 2000 p and 4000 p rad/sec. If carrier frequency is 2p x 10⁶ rad/sec the frequencies of upper sidebands are
1.002 MHz and 1.004 MHz
1.001 MHz and 1.002 MHz
1.001 MHz and 1.004 MHz
1.002 MHz and 1.008 MHz

⇒ How many lines are there in address bus of 8085 μp?
6
8
12
16

⇒

Assertion (A): An RTD uses platinum coil.

Reason (R): Platinum is a very stable material.

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

⇒ State variables which describe a system are a unique set.
TRUE
FALSE

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

⇒ The function to Calculate the maximum value in the specified field of a database is
DM
DMAX
MAX
DBMAX

⇒ The leakage current in CB configuration may be around
few micro amperes
few hundred micro amperes
few milliamperes
few hundred milliamperes

⇒ A super heterodyne receiver has an input circuit tuned to a 570 KHz signal. If the intermediate frequency of the amplifier is tuned to 455 KHz. The quality factor Q for a Image Rejection ratio of 125?
100
56.81
42.74
87