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Which of the following conditions must be satisfied for a transistor to remain under saturation?
| |
A. | 1 and 2 [Wrong Answer] |
B. | 1 and 3 [Wrong Answer] |
C. | 2 and 3 [Wrong Answer] |
D. | 1 and 4 [Correct Answer] |
View Answer
Explanation:-
Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ If any term in the first column of a Routh array becomes zero, then
Routh criterion cannot be used to determine stability
Routh criterion can be used by substituting a small positive number for zero and completing the array
Routh criterion can be used by substituting a big positive number for zero and completing the array
Routh criterion can be used by substituting a small negative number for zero and completing the array
⇒ In which of the following does a negative resistance region exist in the v-i characteristics?
PIN diode
Schottky diode
Tunnel diode
Zener diode
⇒ For an n-channel enhancement type MOSFET, if the source is connected at a higher potential than that of the bulk (V_{SB} > 0), the threshold voltage V_{T} of the MOSFET will
remain unchanged
decrease
change Polarity
increase
⇒ When a 10 K, 10%, 1/4 Ω resistor is connected in series with a 12 K, ± 1%, 1/4 Ω resistor, the resulting combination has the following specifications
22 K, ± 11%, 1/2 Ω
22 K, ± 5.5%, 1/2 Ω
22 K, ± 5.5%, 1/8 Ω
none of these
⇒ The signal x(t) = A cos (ω_{0}t + φ) is
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⇒ An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. Which of the following will increases from this type of operation?
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⇒ A two winding transformer is feeding a single phase half wave rectifier circuit. The load is purely resistive. The rms value of transformer secondary current is I_{s} and rms value of load current in I_{rms}. Then
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I_{s} = 0.5 I_{rms} irrespective of the value of firing angle
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⇒ The characteristic equation of a closed loop system is (s + 2) (s + 3) + K = 0. The centroid of the asymptotes in root locus is:
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⇒ For a transfer function the coefficients of the numerator and denominator polynomials in s must be real.
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⇒ If the iron core of a coil is removed so that it becomes an air cored coil, its inductance
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⇒ The phase angle of lead circuit is
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Both A and R are true and R is correct explanation of A
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⇒ How is an N-channel junction Field Effect Transistor operated as an amplifier?
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⇒ If any term in the first column of a Routh array becomes zero, then
Routh criterion cannot be used to determine stability
Routh criterion can be used by substituting a small positive number for zero and completing the array
Routh criterion can be used by substituting a big positive number for zero and completing the array
Routh criterion can be used by substituting a small negative number for zero and completing the array
⇒ In which of the following does a negative resistance region exist in the v-i characteristics?
PIN diode
Schottky diode
Tunnel diode
Zener diode
⇒ For an n-channel enhancement type MOSFET, if the source is connected at a higher potential than that of the bulk (V_{SB} > 0), the threshold voltage V_{T} of the MOSFET will
remain unchanged
decrease
change Polarity
increase
⇒ When a 10 K, 10%, 1/4 Ω resistor is connected in series with a 12 K, ± 1%, 1/4 Ω resistor, the resulting combination has the following specifications
22 K, ± 11%, 1/2 Ω
22 K, ± 5.5%, 1/2 Ω
22 K, ± 5.5%, 1/8 Ω
none of these
⇒ The signal x(t) = A cos (ω_{0}t + φ) is
energy signal
power signal
energy Power
none
⇒ An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. Which of the following will increases from this type of operation?
Stability
Bandwidth
Distortion
Input resistance
⇒ A two winding transformer is feeding a single phase half wave rectifier circuit. The load is purely resistive. The rms value of transformer secondary current is I_{s} and rms value of load current in I_{rms}. Then
I_{s} = I_{rms} irrespective of the value of firing angle
I_{s} = 0.5 I_{rms} irrespective of the value of firing angle
I_{s} = I_{rms} if firing angle is less than 30°
I_{s} = I_{rms} if firing angle is more than 30°
⇒ Which configuration has high input impedance and low output impedance?
CB
CE
CC
CB and CE
⇒ 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
⇒ Class C operation finds application in
RF power amplifiers
frequency multipliers
both (a) and (b)
neither (a) nor (b)
⇒ For the control system in the given figure, the value of K for critical dampin
1
5.125
6.831
10
⇒ An 8085 microprocessor based system uses a 4 k x 8 bit RAM whose address in AAOOH. The address of the last byte in this RAM is
OFFFH
1000H
B9FFH
BA00H
⇒ An arithmetic statement in C must be
integer mode arithmetic statement
real mode arithmetic statement
mixed mode arithmetic statement
any of the above
⇒ In a RS flip-flop no change occurs during
prohibited mode
set mode
reset mode
disable mode
⇒ The deflection sensitivity of a CRO is generally expressed in
meter/V
cm/V
V/meter
V/cm
⇒ For a transfer function the coefficients of the numerator and denominator polynomials in s must be real.
TRUE
FALSE
⇒ Decimal 18.29 when converted int 10's complement will become
81.7707
81.7
81.777
81.077
⇒ The realization of the term Ks yields
a resistance of value K ohms
a capacitances of value K farads
an inductance of value k farads
either (b) or (c)
⇒ In the circuit of figure, v_{1} = v_{2} = 10 V.
I_{1} = I_{2}
I_{1} > I_{2}
I_{2} > I_{1}
I_{1} = 0
⇒ For a photoconductor with equal electron and hole mobilities and perfect ohmic contacts at the ends, an increase in illumination results in
a change in O.C. voltage
a change in S.C. current
a decrease in resistance
an increase in resistance
⇒
Assertion (A): Relaxation time and mean time between collisions are equal when scattering is isotropic.
Reason (R): Mean free path of an electron λ, velocity of electron v and mean time between collisions t_{c} are related as λ = vT_{c}.
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 but R is false
A is false but R is true
⇒ Nichols chart consists of
constant magnitude loci
constant phase angle loci
magnitude and phase angle loci in log-magnitude versus phase diagram
none of the above
⇒ Capacitance hats are installed on low frequency antenna is
increase the electrical length
reduce the electrical length
protect against lightening
protect against corona effects
⇒ Which of the following expressions may be used to correctly describe the temperature (T) variation of the intrinsic carrier density (n_{i}) of a semiconductor?
n_{i}(T) = (A/T) exp (- E_{8}/kT^{2})
n_{i}(T) = A (- E_{8}/2kT)^{10}
n_{i}(T) = A exp (- E_{8}/2kT^{2})
n_{i}(T) = AT^{3/2} exp (-E_{8}/2kT)
⇒ The absorption of EM wave by the atmosphere depends on
polarization of waves
frequency in use
dist. from T_{y}
height of antenna
⇒ Which of these triggering methods for series connected SCRs use LASCR in the gate circuit?
Resistance triggering
Simultaneous triggering
Sequential triggering
Optical triggering
⇒ If the iron core of a coil is removed so that it becomes an air cored coil, its inductance
will increase
will decrease
will remain the same
may increase or decrease
⇒ The phase angle of lead circuit is
between 0 and -90°
between 0 and +90°
90°
more than 90°
⇒
Assertion (A): Double Kelvin's bridge is used to measure low resistances.
Reason (R): In low resistance, the contact and lead resistances are very important.
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
⇒ How is an N-channel junction Field Effect Transistor operated as an amplifier?
With a forward bias gate source junction
With a reverse bias gate-source junction
With a open gate source junction
With a shorted gate source junction