Question is ⇒ The specified maximum junction temperature of thyristors is about, Options are ⇒ (A) 50°C, (B) 80°C, (C) 120°C, (D) 200°C, (E) , Leave your comments or Download question paper.

Question is ⇒ The specified maximum junction temperature of thyristors is about, Options are ⇒ (A) 50°C, (B) 80°C, (C) 120°C, (D) 200°C, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	The specified maximum junction temperature of thyristors is about
A.	50°C [Wrong Answer]
B.	80°C [Wrong Answer]
C.	120°C [Correct Answer]
D.	200°C [Wrong Answer]
View Answer 1 -2 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 :

⇒ A periodic voltage v(t) = 1 + 4 sin ωt + 2 cos ωt is applied across a 1 ohm resistance. The power dissipated is
1 W
11 W
21 W
24.5 W

⇒ The switch in the circuit shown was on position a for a long time, and is moved to position b at time t = 0. The current i(t) for t > 0 is give
0.2e^-125tu(t) mA
20e^-1250tu(t) mA
0.2e^-1250tu(t) mA
20e^-1000tu(t) mA

⇒ A lossless transmission line is 50 cm long and operates at a frequency of 500 MHz. Inductance and capacitances present in a line are 0.5 μH/m and 200 pF/m. Phase constant and phase velocity are respectively.
5p, 2p x 10⁸ m/sec
5p, 10⁸ m/sec
31.4, 10⁸ m/sec
31.4, 2p x 10⁸ m/sec

⇒ In figure, the short circuit current through terminal AB wil
1.5 A
0.125
0.0833333333333333
0.0416666666666667

⇒ (2)₃ + (3)₄ = (?)₅
4
11
none of these
not possible

⇒ In a television camera tube, scanning of a picture is done
line by line from left to right
line by line from right to left
line by line from top to bottom
line by line from bottom to top

⇒ If σ is standard deviation, variation is
σ - 1
σ^1.5
σ²
σ³

⇒ Which of the following needs DC forward voltage to emit light?
LED
LCD
Both LED as well as LCD
None of the above

⇒ The phase angle corresponding to λ/4 in a standing-wave pattern is
30°
90°
135°
180°

⇒ A single phase half wave controlled rectifier circuit has a free wheeling diode. The load is a combination of R and L. The firing angle is a. The period of conduction of SCR and free wheeling diode respectively are
a < ωt < p and p < ωt < (2p + a)
a < ωt < p and p < ωt < 2p
a < ωt < (p + a) and (p + a) < ωt < 2p
a < ωt < p and p < ωt < (2p - a)

⇒ In the given figure 15.6 shows a series, R - C circuit fed by a current source i(t). There is an initial voltage v₀. across the capacitor. The sy
is linear
is non linear
may be linear or non linear
is linear only if v₀ is zero

⇒ A constant k high pass p section has a characteristic impedance of 300 Ω at f = ∞ . At f = f_c, the characteristic impedance will be
zero
∞
300 Ω
more than 300 Ω

⇒ An unmodulated voltage 10 V effective is applied to a dioxide detector in which load resistance is 4 x 10^-5 ohms. A micrometer shows that the rectified DC current in this resistance is 30 A. The input resistance of the detector is
114 kW
336 kW
384 kW
455 kW

⇒ An antenna has a gain of 44 dB. Assuming that the main beam of the antenna is circular in cross-section the beamwidth will be
0.4456°
1.4456°
2.4456°
3.4456°

⇒ A waveguide operated below cut off frequency can be used as
phase shifter
an attenuator
an isolator
none

⇒ Figure represen
LED
Varistor
SCR
Diac

⇒ The spectral component of noise associated with k^th frequency is given, in the limit as Δf → 0 by n_k(t) written as n_k(t) = C_k cos (2pk Δft + θ_{k1, 2 only
1, 3 only
1, 2, 3
2, 3 only}

⇒ The attraction between the nucleus and valence electron of copper atom is
zero
weak
strong
either zero or strong

⇒ How many lines are there in address bus of 8085 μp?
6
8
12
16

⇒ A system is said to be static system, when present output depend upon
present I/P
presrent and past
present and future
past and future

⇒ Lead becomes a superconductor at
9.1 K
7 K
5 K
3 K

⇒ If the number of atoms per unit volume of a monoatomic gas changes, the dielectric constant still remains constant.
TRUE
FALSE

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

⇒ A full wave bridge diode rectifier uses diodes having forward resistance of 50 ohms each. The load resistance is also 50 ohms. The voltage regulations is
0.2
0.5
1
2

⇒ There is no hysteresis phenomenon is any dielectric material.
TRUE
FALSE

⇒ Under identical conditions, for a single modulating frequency, FM and PM are indistinguishable. Now if the modulating frequency is reduced, then
phase modulation index as well as frequency modulation index decrease
phase modulation index as well as frequency modulation index increase
phase modulation index will remain constant whereas frequency modulation index will increase
phase modulation index will decrease whereas frequency modulation index will remain constant

⇒ For a given operating frequency a waveguide has more power handling capacity than a coaxial line.
TRUE
FALSE

⇒ Colour code of carbon resistors has only two bands.
TRUE
FALSE

⇒ Forbidden energy gap in germanium at 0 K is about
10 eV
5 eV
2 eV
0.78 eV

⇒

Match the following:

	List I (BHE, A0)		List II (Word is read/write)
A.	0, 0	1.	1 byte from/to odd address
B.	0, 1	2.	1 byte from/to even address
C.	1, 0	3.	16 bit word
D.	1, 1	4.	None

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