Question is ⇒ The minimum value of hfe of a transistor used in RC phase shift oscillator is, Options are ⇒ (A) 54.4, (B) 45.4, (C) 44.5, (D) 29, (E) , Leave your comments or Download question paper.

Question is ⇒ The minimum value of hfe of a transistor used in RC phase shift oscillator is, Options are ⇒ (A) 54.4, (B) 45.4, (C) 44.5, (D) 29, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The minimum value of h_fe of a transistor used in RC phase shift oscillator is
A.	54.4 [Wrong Answer]
B.	45.4 [Wrong Answer]
C.	44.5 [Correct Answer]
D.	29 [Wrong Answer]
View Answer 4 -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 :

⇒ Consider the following strings

A
Z2
X3Y
P12R
BX

Which of the above strings are valid in Pascal?
All
1, 2, 3
1, 2, 4, 5
1, 2, 3, 5

⇒ Dolby system of noise reduction divides the total audio spectrum into
8 frequency bands
4 frequency bands
2 frequency bands
none of the above

⇒

Assertion (A): The number ∈ such that the probability that an error is between -∈ and + ∈ is 1 is called probable error of single obserevation.

Reason (R): The standard deviation is the arms value of the deviation from the arithmetic mean.

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

⇒ In the fabrication of n-p-n transistor in an IC, the buried layer on the P-type substrate is
P⁺ -doped
n⁺ -doped
used to reduce the parasitic capacitance
located in the emitter region

⇒ Which of the following is the ferric electric material?
Rochelle salt
Barium titanate
Potassium dihydrogen phosphate
All of the above

⇒

Assertion (A): ∈₀ has the dimensions of farad per meter.

Reason (R): D = ∈₀∈_r E.

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

⇒ In a loss less line the propagation constant is equal to
jωLC
LC
jωLC
LC

⇒ Laplace transform of a unit doublet U_-2 (t) is
1/s
s
0
1

⇒ In a minimum phase system
all poles lie in the left half plane
all zeros lie in the left half plane
all poles lie in the right half plane
all except one pole or zero lie in the left half plane

⇒ Which of the following is not treated as hexadecimal constant by assembler in 8085?
64 H
5 AFH
AFH
OCFH

⇒ For F₁ layer the maximum ionic density is 2.3 x 10⁴ electrons per cc. The critical frequency for this layer will be
1.36 MHz
13.6 MHz
136 MHz
1360 MHz

⇒ Two messages m₁, and m₂ have a probability of 0.5 each. The entropy is
0.25
0.5
0.75
1

⇒ Which of following antenna does not depend upon the frequency?
Log-periodic
Parabolic
Conical
All of the above

⇒ A transmission line discontinuity is defined as any interruption in the uniformity of the line.
TRUE
FALSE

⇒ The output of a half adder is
SUM
CARRY
SUM and CARRY
none of the above

⇒

Assertion (A): A semiconductor strain gauge is more accurate than a resistance strain gauge.

Reason (R): The gauge factor of a semiconductor strain gauge is about 100 where as the gauge factor of a resistance strain gauge is only about 2.

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

⇒ Assuming accumulator contain A 64 and the carry is set (1). What will register A and (CY) contain after XRA A?
A 6 H, 1
A 6 H, 0
00 H, 0
00 H, 1

⇒ AECF1₁₆ + 15ACD₁₆ = __________ .
C47BB₁₆
C47BE₁₆
A234F₁₆
A1111₁₆

⇒ In figure, the steady state current through 1H inductanc
Zero
0.125
0.208333333333333
0.25

⇒ In the given figure the line voltage after a number of reflections wil
30 V
-30 V
10 V
-10 V

⇒ Which of the following are voltage controlled devices?
Vacum triode
FET
SCR
Both (a) and (b)

⇒ An iron specimen has µ_r = 1000 when B = 0.3 T. If B = 0.35 T, µ_r
will be 1000
will be less than 1000
will be more than 1000
may be more or less than 1000

⇒ What is the purpose of peak clipper circuits in radio transmitters?
To prevent overmodulation
To reduce bandwidth
To increase bandwidth
To regulate oscillator I/P voltage

⇒ In a 3 phase semiconverter, the output voltage becomes discontinuous for
firing angle > 30°
firing angle > 60°
firing angle > 90°
firing angle > 120°

⇒ The most serious problems in ac bridge measurement is
eddy currents
leakage current
residual magnetism
stray fields

⇒ How many maximum number of functions can be defined with two symbols which are Boolean in nature:
4
8
2
16

⇒ If carrier modulated by a digital bit stream had one of the possible phases of 0°, 90°, 180°, 270°, then the modulation is called.
BPSK
QPSK
QAM
MSK

⇒ A silicon PN junction diode under reverse bias has depletion region of width 10 μm. The relative permittivity of silicon, ε_r = 11.7 and the permittivity of free space ε₀ = 8.85 x 10^-12 F/m. The depletion capacitance of the diode per square meter is
100 μF
10 μF
1 μF
20 μF

⇒ Find value
1A
0A
0.45 A
None of these

⇒

Match the following:

	List I		List II
A.	Coastals receiver	1.	VSB
B.	Stereo-multiplexing	2.	Demodulating DSB-SC
C.	TV broad casting	3.	FM radio broad casting
		4.	Slope overload
		5.	Matched filter

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