Question is ⇒ The characteristics of H and V sync pulses in a colour TV receiver are <ol style="list-style-type: decimal; padding-bottom:10px;"><li style="padding-top:10px;">H sync, pulses are narrow and have frequency of 15625 Hz</li><li style="padding-top:10px;">V sync, pulses are much wider and have frequency of 50 Hz</li><li style="padding-top:10px;">H and V pulses have almost the same size but frequencies of 15625 and 50 Hz respectively</li><li style="padding-top:10px;">V sync, pulses are very narrow but H sync, pulses are wide and their frequencies are 15625 Hz and 50 Hz respectively</li></ol> Which of the above are correct?, Options are ⇒ (A) 1 and 2 only, (B) 1 only, (C) 3 only, (D) 4 only, (E) , Leave your comments or Download question paper.

Question is ⇒ The characteristics of H and V sync pulses in a colour TV receiver are <ol style="list-style-type: decimal; padding-bottom:10px;"><li style="padding-top:10px;">H sync, pulses are narrow and have frequency of 15625 Hz</li><li style="padding-top:10px;">V sync, pulses are much wider and have frequency of 50 Hz</li><li style="padding-top:10px;">H and V pulses have almost the same size but frequencies of 15625 and 50 Hz respectively</li><li style="padding-top:10px;">V sync, pulses are very narrow but H sync, pulses are wide and their frequencies are 15625 Hz and 50 Hz respectively</li></ol> Which of the above are correct?, Options are ⇒ (A) 1 and 2 only, (B) 1 only, (C) 3 only, (D) 4 only, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The characteristics of H and V sync pulses in a colour TV receiver are H sync, pulses are narrow and have frequency of 15625 Hz V sync, pulses are much wider and have frequency of 50 Hz H and V pulses have almost the same size but frequencies of 15625 and 50 Hz respectively V sync, pulses are very narrow but H sync, pulses are wide and their frequencies are 15625 Hz and 50 Hz respectively Which of the above are correct?
A.	1 and 2 only [Correct Answer]
B.	1 only [Wrong Answer]
C.	3 only [Wrong Answer]
D.	4 only [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 :

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

⇒

Match the following:

	List I		List II
A.	V_OH(min)	1.	2.4 V
B.	V_IH(min)	2.	1.5 V
C.	V_OL(max)	3.	0.4 V
		4.	2.0 V
		5.	0.8 V

A-1, B-3, C-4
A-1, B-4, C-3
A-5, B-4, C-3
A-1, B-5, C-2

⇒ If a sound wave has a frequency of 50 Hz, the wavelength is
66 m
6.6 m
0.66 m
0.066 m

⇒ An R-L circuit has an initial current of 5 A. In the s-domain equivalent circuit, the voltage source to take into account the initial current has a strength of
5L volts
5/L volts
5L² volts
5/L² volts

⇒ A short circuited stub is shunt connected to a transmission line as shown in the figure is, if z₀ = 500 ohms, the admittance y seen at the function of the stub and the transmission line
(0.01 - j 0.02) mho
(0.02 - j 0.01) mho
(0.04 - j 0.02) mho
(0.02 + j 0) mho

⇒ An ac network has two sources of the same frequency. The currents in one branch when the sources act independently are 10 ∠30° A and 10 ∠60° A. When both sources act, the current in the branch should be
19.32 ∠45°
15 ∠45°
20 ∠45°
zero

⇒ Which of the following statement regarding waveguides is incorrect?
At waveguide can be coupled to a coaxial cable
At frequencies below the cut off value the wave progresses across the waveguide after total reflections
Waveguides are usually air filled hollow conducting metallic tubes for transmitting UHF and microwaves
Waveguides can handle large power at UHF and microwaves

⇒ Which one is true for writing array variable in Pascal?
The general form of an array variable is an integer or a real variable name followed by subscripts enclosed within square brackets. The subscripts are separated by commas
The general form of an array variable must be an integer name followed by subscripts enclosed within square brackets. The subscripts are separated by commas
The subscripts in array variable must be separated by dots
The subscripts must be enclosed within parenthesis

⇒

Assertion (A): BCD code is used in pocket calculators

Reason (R): BCD code is slower than binary.

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

⇒ The probability giving distribution of electrons over a range of allowed energy levels is known as
Maxwell's Distribution
Fermi-Dirac Distribution
Richardson Dushman Distribution
none of the above

⇒ 71₈ = __________ .
111000₂
111001₂
100001₂
110001₂

⇒ Amplification of ultrasonic waves is possible in a piezoelectric semiconductor under applied electric field. The basic phenomenon involved is known as
electrostriction
acousto-optic interaction
acousto-electric interaction
stimulated Brillouin scattering

⇒ The emitter bias largely depends on
gain
signal input
I_E
none of the above

⇒ In a backward wave oscillator the wave travelling along the line winds itself back and forth
TRUE
FALSE

⇒ The characteristic equation of a closed loop system is (s + 2) (s + 3) + K = 0. The centroid of the asymptotes in root locus is:
2.5
-2.5
0.5
-0.5

⇒ In C the keywords are also called
special words
reserved words
class words
character words

⇒ Armstrong F.M. transmitter performs frequency multiplication in stages
to increase the overall S/N
for convenience
to reduce the bandwidth
to find the desired value of carrier frequency with frequency deviation

⇒ To obtain very high input and O/P impedance in a feedback amplifier, the type of feedback utilized
voltage series
current series
voltage shunt
current shunt

⇒ When iron rod is magnetised by the flowing through its coil, the polarities of its different points wil
Pole A is N-pole, B is S-pole and C is neutral
A is N, B and C is S
A is N, C is S
A is S, C is neutral, B is N

⇒ For an npn transistor connected as shown in the figure V_BE = 0.7 volts. Given that reverse saturation current of the junction at room temperature 300K is 10^-13A, the emitter curr
30 mA
39 mA
49 mA
20 mA

⇒ Tropospheric scatter propagation is not subject to any fading.
TRUE
FALSE

⇒

Assertion (A): Moving iron instrument can be used on ac or dc.

Reason (R): In a moving iron instrument deflecting torque is proportional to square of current.

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

⇒ If CS = A₁₅ A₁₄ A₁₃ is used as chip select logic of a 4 K RAM in 8085 system, its memory range is
3000 H - 3 FFF H
7000 H - 7 FFFH
5000 H - 5 FFF H and 6000 H - 6 FFF H
6000 H - 6 FFF H and 7000 H - 7 FFF H

⇒ An end fire array consisting of several half-wave lengths of directive gain 40, then array length will be
10 λ
100 λ
20 λ
5 λ

⇒ For type 0 system the starting point (i.e. ω = 0) of polar plot is finite and is on positive real axis.
TRUE
FALSE

⇒ In brushless excitation system of modern alternators, the main exciter is
dc generator
ac generator
either dc or ac generator
induction generator

⇒ In CE approximation, the upper end of d.c. load line is called the __________ point and the lower end is the __________ point.
Q, base
base, Q
saturation, cut off
cut off, saturation

⇒ In a Weston synchronoscope, the moving coil is connected across
bus bar
incoming alternator
lamp
fixed coils

⇒ The output voltage waveform of a CE amplifier is fed to a dc coupled CRO. The trace on the screen will be
dc output voltage
ac output voltage
sum of dc and ac output voltage
either (a) or (b)

⇒ In a sequential circuit the output at any instant depends on
present inputs only
past inputs only
past outputs only
past output and present input