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An impulse train is | |
A. | a number of pulses [Wrong Answer] |
B. | a number of pulses spaced from each other [Correct Answer] |
C. | a number of pulses all originating together [Wrong Answer] |
D. | none of the above [Wrong Answer] |
View Answer
Explanation:-
Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ A 4 bit synchronous counter uses flip flops with a delay time of 15 ns each. The time required for change of state is
15 ns
30 ns
45 ns
60 ns
⇒ A 50 p characteristic impedance line is connected to a load which shows a reflection coefficients of 0.268. If V_{in} = 15 volt, then the net power delivered to the load will be
0.139 W
1.39 W
0.278 W
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⇒ Consider the following statements:
1 only
2 only
1 and 2
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⇒ Pick the Odd one out
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FET
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⇒
Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
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⇒ If the absolute value of a number is less than decimal 1, the sign of exponent in floating point representation is
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⇒ What is the gray code word for EX-OR the binary number 101011?
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110101
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⇒ An RC snubber circuit is used to protect a thyristor against :
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⇒ In a 3 phase full wave regulator feeding resistance load connected in star, the possible range of firing angle a is
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⇒ For K map of the given figure the simplified Boolean expressio
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⇒ In 8085 microprocessor, if instruction RST is written in a program then the program will jump to location
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⇒ If V_{dc1} is the dc output voltage in half wave controlled rectifier circuit feeding resistive load and V_{dc2} is the dc output voltage in full wave controlled rectifier circuit (M - 2 connection) feeding resistive load, then
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⇒ A 4 bit synchronous counter uses flip flops with a delay time of 15 ns each. The time required for change of state is
15 ns
30 ns
45 ns
60 ns
⇒ A 50 p characteristic impedance line is connected to a load which shows a reflection coefficients of 0.268. If V_{in} = 15 volt, then the net power delivered to the load will be
0.139 W
1.39 W
0.278 W
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⇒ Pick the Odd one out
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FET
Planer transistor
Unijunction transistor
⇒
Assertion (A): Intrinsic semiconductor is an insulator at 0 K.
Reason (R): Fermi level in intrinsic semiconductor is in the centre of forbidden energy band.
Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
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A is false but R is true
⇒ If the absolute value of a number is less than decimal 1, the sign of exponent in floating point representation is
zero
negative
zero or negative
positive
⇒ What is the gray code word for EX-OR the binary number 101011?
101011
110101
111110
11111
⇒ An RC snubber circuit is used to protect a thyristor against :
false triggering
failure to turn on
switching transients
failure to commutate
⇒ In a 3 phase full wave regulator feeding resistance load connected in star, the possible range of firing angle a is
0 ≤ a ≤ 180°
0 ≤ a ≤ 150°
0 ≤ a ≤ 120°
0 ≤ a ≤ 90°
⇒ For K map of the given figure the simplified Boolean expressio
Y = A B C + A B C + A B C
Y = A C + B
Y = A B C + ABC
Y = A B C + AB C + ABC
⇒ Which has the lowest propagation delay time?
ECL
TTL
CMOS
PMOS
⇒ In 8085 microprocessor, if instruction RST is written in a program then the program will jump to location
0020 H
0024 H
0028 H
002 CH
⇒ Decimal number 9 in gray code =
1100
1101
110
1111
⇒ In a 4 bit counter the output of 3 JK FFs from MSB downward are connected to the NAND gate whose O/P is connected to CLR
it is a MOD-14 counter
it is MOD-13 counter
it is divided by 13 counter
it is divide by 10 counter
⇒ Fermi level is the maximum energy that an electron can possess at 0 K.
TRUE
FALSE
⇒ The range of values of a and b for which the linear time invariant system with impulse respon
|a| > 1, |b| > 1
|a| < 1, |b| < 1
|a| < 1, |b| > 1
|a| > 1, |b| < 1
⇒ If initial value of
PROD
is zero and a program adds X to PROD
, Y times we get the resultX + Y
XY
X / Y
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⇒ If each stage has a gain of 10 dB and noise figure of 10 dB, then the overall noise figure of a two stage cascade amplifier will be
10
1.09
1
10.9
⇒ The silicon sample with unit cross-sectional area shown below is in thermal equilibrium. The following information is given: T = 300 K, electronic charge = 1.6 x 10^{-19}C, thermal voltage = 26mV and electron mobility = 1350 cm^{2}
1 kV/cm
5 kV/cm
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⇒ 1 GHz is equal to
10^{6} Hz
10^{8} Hz
10^{9} Hz
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⇒ The current rating of dc tachogenerator is usually
small
high
medium
either (b) or (c)
⇒ The main advantage of DM over PCM is
less bandwidth
less power
simple circuit
better S/N ratio
⇒ A thyristor has a maximum allowable junction temperature of 120°C and the ambient temperature is 40°C. If thermal resistance is 1.6° C/W, the maximum allowable internal power dissipation is
20 W
50 W
92 W
128 W
⇒ The signal input to a given amplifier is made up of 100 mΩ signal power and 1 mΩ noise power. The amplifier contributes an additional 100 mΩ of noise and has a power gain of 20 dB. The input signal-to noise ratio is
2
10
20
100
⇒ The measurement of Hall coefficient of a semiconductor with one type of charge carriers gives the information about
sign of charge carrier
density of charge carrier
both sign and density of charge carrier
none of the above
⇒ In 8085 microprocessor, even after a Reset operation which of the following interrupts remains enabled?
INTR
RST 5.5
RST 7.5
TRAP
⇒ The voltage across a zener diode
is constant in forward direction
is constant in reverse direction
is constant in both forward and reverse directions
none of the above
⇒ Positive feedback is mainly used in
oscillators
thyristors
voltage regulators
both (a) and (b)
⇒ If V_{dc1} is the dc output voltage in half wave controlled rectifier circuit feeding resistive load and V_{dc2} is the dc output voltage in full wave controlled rectifier circuit (M - 2 connection) feeding resistive load, then
V_{dc1} = 0.5 V_{dc2} for all values of firing angle
V_{dc1} = V_{dc2} for all values of firing angle
V_{dc1} ≤ 0.5 V_{dc2} for all values of firing angle
V_{dc1} ≥ 0.5 V_{dc2} for all values of firing angle
⇒ 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