Question is ⇒ The thermal resistance of a BJT is about, Options are ⇒ (A) 100° C/W, (B) 200° C/W, (C) 20° C/W, (D) 2° C/W, (E) , Leave your comments or Download question paper.

Question is ⇒ The thermal resistance of a BJT is about, Options are ⇒ (A) 100° C/W, (B) 200° C/W, (C) 20° C/W, (D) 2° C/W, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The thermal resistance of a BJT is about
A.	100° C/W [Wrong Answer]
B.	200° C/W [Correct Answer]
C.	20° C/W [Wrong Answer]
D.	2° C/W [Wrong Answer]
View Answer 1 -1 Explanation:- Answer : B 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 :

⇒ The time constant of the capacitance circuit is defined as the time during which voltage
falls to 36.8% of its final steady value
rises to 38.6% of its final steady value
rises to 63.2% of its final steady value.
none of the above.

⇒ The circuit in figure will act as ideal current source with respect to terminals A and B when frequenc
0
1 rad/sec
4 rad/sec
16 rad/sec

⇒ The effective electrical length of an antenna is __________ its physical length
greater than
equal to
less than
none of the above

⇒ A long periodic antenna is a
frequency independent antenna
frequency dependent antenna
directional antenna
none of the above

⇒ The circuit of figure give an output which
a frequency modulated signal
an amplitude modulated signal
a phase modulated signal
none of the above

⇒ To relay outdoor remotely located live programs, TV transmitter use
microwave links
coaxial cable link
open wire link
either (b) or (c)

⇒ Which of the following is not a valid integer constant in C (for 16 bit)?
321
-162
-65321
1

⇒ A series RC circuit has R = 5 Ω and C = 10 μF. The current in the circuit is 5 sin 20000t. The applied voltage is
252 sin (20000t + 45°)
252 sin (20000t - 45°)
252 sin 20000t
252 sin (20000t - 90°)

⇒ A heater is rated at 230 V, 5 A AC. Then
both the current and voltage are peak values
both the current and voltage are rms values
the current is peak value and voltage is rms value
the current is rms value and voltage is peak value

⇒ The dominant mode in a rectangular wave-guide is
TE₀₁
TM₀₁
TE₁₀
TM₁₁

⇒ A current of 1 A in the coil of an iron cored electromagnet causes B = 0.5T. If current is 2A, B =
0.5 T
1 T
1 T or more
1 T or less

⇒ For the two ports in figure, y₁₁ = 8 mho, y₁₂ = y₂₁ = -6 mho and y₂₂ = 6 mho. The values of Y_A, Y_B, Y_C respectively
2, 6, 6 mho
2, 6, 0 mho
2, 0, 6 mho
2, 6, 8 mho

⇒ The name field effect is related to the __________ layers of a JFET.
depletion
drain
source
gate

⇒ The range of RTD using platinum is about
-100° C to 700°C
-200°C to 1000°C
100°C to 1000°C
about 500°C

⇒ An E transformer is a
displacement transducer
velocity transducer
acceleration transducer
pressure transducer

⇒ A magnetron has a cylindrical cathode surrounded by an anode structure having cavities opening into interaction space by means of slots
TRUE
FALSE

⇒ The accuracy of measurement using CRO is about
± 0.5%
± 0.05 %
± 1%
± 3%

⇒ The sampling frequency in CD is 10 kHz.
TRUE
FALSE

⇒ Magnetic deflection sensitivity is defined as
deflection/flux density
(deflection/flux density)^0.5
(Deflection)^0.5/flux density
none of the above

⇒

Assertion (A): In root locus the breakaway and break in points either lie on real axis or occur in complex conjugate pairs.

Reason (R): All root locus asymptotes intersect on real axis.

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 correct but R is wrong
R is correct but A is wrong

⇒ Lower chip area requirements of MOS is advantage in
low power circuits
high power circuits
repetitive operation circuits
large scale integration

⇒ Wave guides are pressurised above normal atmospheric pressure for
increasing the power handling capacity
improving conductivity of walls
preventing higher modes from propagation
varying the wave impedance

⇒ In a JK master slave flip flop
master is clocked when clock is low
slave is clocked when clock is high
master is clocked when clock is high and slave is clocked when clock is low
master is clocked when clock is low and slave is clocked when clock is high

⇒ In figure, i(0^-) and v(0^-) are zero. The switch is closed at t = 0, i(0⁺) and (∞)
3 A and 1.5 A
1.5 A and zero
3 A and zero
1.5 A and 3 A

⇒ In a JFET
gate source cut off voltage is equal to V_DS
gate source cut off voltage is equal to pinch off voltage
gate source cut off voltage is twice the pinch off voltage
gate source cut off voltage is equal to negative pinch off voltage

⇒ The static equalisation circuit for thyristors connected in series is
one resistor in series with each thyristor
one resistor in parallel with each thyristor
one resistor and one capacitor in parallel with each thyristor
none of the above

⇒

Match the following:

	List I (Transmission system)		List II (Mode)
A.	Rectangular waveguide	1.	TE/TM
B.	Circular waveguide	2.	TEM
C.	Coaxial line	3.	Quasi TEM
D.	Microstrip line

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

⇒ Consider the network: Impedance of this network as a function of the complex frequency is consists of a certain number of zeros and poles. What is the location of po
-2
-2, ∞
2
2, ∞

⇒ In a commercially available good power supply the voltage regulation is about
0.01
0.05
0.1
0.2

⇒ Consider a Binary Symmetric Channel (BSC) with probability of error being p. To transmit a bit, say 1, we transmit a sequence of three 1 s. The receiver will interpret the received sequence to represent 1 if at least two bits are 1. The probability that the transmitted bit will be received in error is
p³ + 3p² (1 - p)
p³
(1 - p)³
p³ + p² (1 -p)