Question is ⇒ The characteristic impedance of a twin wire feeder used for TV signals is about, Options are ⇒ (A) 1000 ohm, (B) 500 ohm, (C) 300 ohm, (D) 100 ohm, (E) , Leave your comments or Download question paper.

Question is ⇒ The characteristic impedance of a twin wire feeder used for TV signals is about, Options are ⇒ (A) 1000 ohm, (B) 500 ohm, (C) 300 ohm, (D) 100 ohm, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The characteristic impedance of a twin wire feeder used for TV signals is about
A.	1000 ohm [Wrong Answer]
B.	500 ohm [Wrong Answer]
C.	300 ohm [Correct Answer]
D.	100 ohm [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 :

⇒ In laboratory experiment the output from reflex klystron is moderated by square wave because
it is easy to generate a square wave
crystal diode operates in square law region of i-v characteristics
it prevents frequency modulation
detector circuit is less complicated

⇒ One ampere means the flow of
One coulomb each minute
One electron per second
One coulomb per second
One coulomb each hour

⇒ If too large current passes through the diode
all electrons will leave
all holes will freeze
excessive heat may damage the diode
diode will emit light

⇒ The surface charge density on a conductor is 1.55 x 10^-9C/m². The conductor is immersed in water with ε = 78ε₀.The electric field will be __________ .
3 V/m
1.55 V/m
2 V/m
2.25 V/m

⇒ A capacitance transducer can be used to measure
thickness of sheet
displacement
level of fluids
all of the above

⇒ The basic amplifier in Weinbridge oscillator consists of
CE stage followed by CE
CE stage followed by CB
CB stage followed by CE
CC stage followed by CE

⇒

Assertion (A): The scale a PMMC ammeter is linear.

Reason (R): The deflecting torque of PMMC is proportional to current in the coil.

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

⇒ Rank of the matr
3
2
1
4

⇒ 8255 A has three 8 bit ports A, B, C for peripheral data transfer. For programming 8255 A, these ports are grouped as
Port A with Port B
Port A with 4 most significant ports of C, port B with 4 least significant ports of C
Port A with Port C
none of the above

⇒ The polar plot of P (jω) = 45° as ω varies from -∞ to ∞ is
a straight line parallel to x-axis
a straight line parallel to y-axis
a line passing through origin and inclined at 45°
a line in first quadrant passing through origin and inclined at 45° to positive x-axis

⇒ In a positive edge triggered D flip flop
D input is called direct set
Preset is called direct reset
Present and clear are called direct set and reset respectively
D input overrides other inputs

⇒ In FM, increased depth of modulation increases
modulation
modulation index
bandwidth
all of the above

⇒ A generator with an internal resistance of 600 Ω drives an amplifier whose input resistance is 400 Ω. The generator's open circuit voltages is 1 mV; the amplifier develops 100mV across an 8kΩ load. The current amplification is
2.5
12.5
25
125

⇒ A 3 stage Johnson counter shown in figure is clocked at a constant frequency of f_c from the starting state of Q₀ Q₁ Q₂ = 101. The frequency of output Q₀ Q₁ Q₂ wil
f_c/2
f_c/3
f_c/6
f_c/8

⇒ The organisatioion of Intel memory chip 127256 is
32 K x 8
16 K x 8
32 K x 4
16 K x 4

⇒ In an amplifier, if the output current flows for 120° of the input cycle, the class of amplifier will be
A
B
C
AB

⇒ In a channel voice coder, the outputs of sixteen 20 Hz low pass filters are sampled, multiplexed and A/D converted. If sampling is at 40 samples/second and 3 bits/sample represents each voltage sample, the bit rate is about
1.9 k bits/sec
0.95 k bits/sec
3.8 k bits/sec
7.6 k bits/sec

⇒ A TR (transmitter receiver) tube has
low loss for low power signals and high
high loss for low power signals and low loss for high level signal
low loss for both low level and high level signals
high loss for both low level and high level signals

⇒ In a superheterodyne receiver, having no RF amplifier, the IF is 455 kHz. The image frequency at 1000 kHz is
1455 kHz
545 kHz
1910 kHz
90 kHz

⇒ Line of sight transmission is used in
radio frequencies below 1 MHz
VHF only
audio signals only
VHF and UHF

⇒ Choose the appropriate turn on and turn off time of a FET
1 ns, 10ns
6 ns, 18ns
4 ns, 8 ns
10 ns, 10 ns

⇒ The dynamometer principle can be used for
ammeter only
voltmeter only
wattmeter only
ammeter, voltmeter and wattmeter

⇒ Consider the following rules about integer constant in C

An integer constant must have at least one digit.
An integer constant must not have a decimal point.
An integer constant may be positive or negative.
The default sign is positive.
A maximum of one comma or blank is allowed.

Which of the above are correct?
All
1, 2, 3, 4 only
1, 2, 3, 5
2, 3, 4, 5 only

⇒ In a valence crystal, the valence electrons
are not shared
are shared between neighbouring atoms
are shared by all atoms
any of the above

⇒ Consider the amplitude modulated (AM) signal A_c cos ω_ct + 2 cos ω_mt cos ω_ct For demodulating the signal using envelope detector, the minimum value of A_c should be
2
1
0.5
0

⇒ When the mains supply is switched off the contents of primary computer memory are lost.
TRUE
FALSE

⇒ For oscillations to starts, the loop gain A β of the oscillator must be initially
less than unity
0.5
1
more than unity

⇒ To draw dc equivalent circuit for a CE amplifier circuit we should
Reduce all ac sources to zero
Open all capacitors
Reduce all ac sources to zero and open all capacitors
Reduce all ac sources to zero and short all capacitors

⇒ In figure, A is ideal ammeter having zero resistance. It will read __________ amp
2
2.5
3
4

⇒ Transverse magnetic (TM) waves have
magnetic field component H in the direction of propagation
electric field component E in the direction of propagation
magnetic field component H in the direction of propagation and no component of electric field E in this direction
electric field component E in the direction of propagation and no component of magnetic field H in this direction