Question is ⇒ Which of the following is an active device?, Options are ⇒ (A) Transformer, (B) Silicon controlled rectifier, (C) Electric bulb, (D) Loudspeaker, (E) , Leave your comments or Download question paper.

Question is ⇒ Which of the following is an active device?, Options are ⇒ (A) Transformer, (B) Silicon controlled rectifier, (C) Electric bulb, (D) Loudspeaker, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Which of the following is an active device?
A.	Transformer [Wrong Answer]
B.	Silicon controlled rectifier [Correct Answer]
C.	Electric bulb [Wrong Answer]
D.	Loudspeaker [Wrong Answer]
View Answer 5 -3 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 :

⇒ In which configuration is ac collector voltage zero?
CE
CB
CC
none of the above

⇒ In the signal flow graph in the given figure the number of forward paths and pairs of non-touching loops are respecti
3 and 1
3 and 2
4 and 2
2 and 4

⇒ Characteristic wave impedance is
ε/μ
(ε/μ)^1/2
E_x/H_y
H_y/E_x

⇒ In colour TV receiver, varactor diode is used for
detection
rectification
tuning
both (a) and (b)

⇒ A TV picture is to be transmitted over a channel of 6 MHz bandwidth at a 35 dB S/N ratio. The capacity of the channel is
50 Mbps
100 Mbps
36 Mbps
72 Mbps

⇒ The signal to noise ratio in telemetry should be better than
5 db
10 db
25 db
60 db

⇒ The fourier transform of a voltage signal x(t) is X(f). The unit of X(f) is __________ .
volts
volt²
volt/sec
volt-sec

⇒ In cable TV local programmes can be telecast at any frequency.
TRUE
FALSE

⇒ An electrical network with 8 independent nodes will have __________ nodal equations.
4
6
7
8

⇒ Following is a reason of distortion in communication system
external interference
random variations
insufficient Channel Bandwidth
all

⇒ Which of the following is non-saturating?
TTL
CMOS
ECL
Both (a) and (b)

⇒ A thermistor is a
thermocouple
thermometer
miniature resistance
heat sensitive explosive

⇒ If initial value of PROD is zero and a program adds X to PROD, Y times we get the result
X + Y
XY
X / Y
X - Y

⇒ 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

⇒ When atoms are held together by the sharing of valence electrons
each atom becomes free to move
neutrons start shifting
they form a covalent bond
some of the electrons are lost

⇒ Human body cannot sustain electric current beyond
1 μA
10 μA
5 μA
35 μA

⇒ In a N-P-N transistor, when emitter junction is forward biased and collector junction is reverse biased, the transistor will operate in
active region
saturation region
cut of region
inverted region

⇒ A colour television signal having bandwidth of 4.6 MHz is digitised using 10 bits sample. The digital bit rate used for its transmission with PCM would be __________ kilobits/second.
92000
920
23000
230

⇒ A wire strain gauge has a gauge factor of 2, resistance of 125 Ω and length 1 m. If length of wire changes by .005 m, change in resistance will be
0.25 Ω
0.5 Ω
1.25 Ω
2.5 Ω

⇒ For broadcasting purpose, full AM signal is preferred to SSB signal because
it requires large bandwidth
generation of full AM is easier
detection of full AM is simpler
none of the above

⇒ In a common Emitter BJT amplifier, the maximum usable supply voltage is limited by
avalanche breakdown of Base emitter junction
collector to Base Breakdown voltage with emitter open (βV_CBO)
collector Emitter Breakdown voltage with base open (βV_CBO)
zener breakdown voltage of the emitter base Junction

⇒

Assertion (A): In ionic dielectrics, P = P_e + P_i.

Reason (R): In ionic crystals, permanent electric dipole moment is zero.

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

⇒

Assertion (A): In C a character constant is either a single alphabet or digit or special symbol enclosed within single inverted commas.

Reason (R): In C the maximum length of a character constant can be 2 characters.

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 R is wrong
A is wrong R is correct

⇒ To increase Q factor of a coil, the wire should be
long
thin
thick
long and thin

⇒ In the periodic train of rectangular pulses F₀ = (V₀/T)d
TRUE
FALSE

⇒
Match the following:
List I (Command in WORD) List II (Meaning)
A. END 1. The bar displays the current position of cursor
B. HOME 2. Moves cursor to the beginning of current line
C. Status 3. Moves cursor to end of document

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

⇒ Photo electric emission can occur only if
wave length of incident radiation is equal to threshold value
wave length of incident radiation is less than threshold value
frequency of incident radiation is less than threshold frequency
none of the above

⇒ 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

⇒ Which of the following materials in not an insulator?
Diamond
Graphite
Bakelite
Lucite

⇒ An RC series circuit is charged by a voltage E. After a long time the battery is removed and a short circuit is placed across R-C. Then
the polarity of voltage across R is same during discharge and during charge
the polarity of voltage across R during discharging is opposite to that during charging
the polarity of voltage across R depends on time constant RC
none of the above

	List I (Command in WORD)		List II (Meaning)
A.	END	1.	The bar displays the current position of cursor
B.	HOME	2.	Moves cursor to the beginning of current line
C.	Status	3.	Moves cursor to end of document

Users Also Read
Previous Papers

Aptitude

Reasoning

Gen.Knowledge

Speak English

English / Verbal

Online / Mock Test

Vedic Math