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Assertion (A): When V_{DS} is more than rated value the drain current in a JFET is very high. Reason (R): When V_{DS} is more than rated value, avalanche breakdown occurs. | |
A. | Both A and R are true and R is correct explanation of A [Correct Answer] |
B. | Both A and R are true but R is not a correct explanation of A [Wrong Answer] |
C. | A is true but R is false [Wrong Answer] |
D. | A is false but R is true [Wrong Answer] |
View Answer
Explanation:-
Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒
Both A and R are correct and R is correct explanation for A
Both A and R are correct but R is not correct explanation for A
A is correct R is wrong
A is wrong R is correct
⇒ In intrinsic semiconductor the increase in conductivity per degree increase in temperature is about
0.02
0.06
0.15
0.25
⇒ For an RC admittance function
all poles and zeros are simple
all poles and zeros are simple and lie on negative real axis
all poles and zeros lie on imaginary axis
all poles and zeros lie on positive real axis
⇒ For maximum unclipped output from a CE amplifier, the Q point should be
at the centre of dc load line
at the centre of ac load line
at the centre of collector current
none of the above
⇒ The tape recorders used in homes have
common head and common amplifier system for recording and playback
different heads and amplifiers for recording and playback
same head but different amplifiers for recording and playback
different heads but same amplifier for recording and playback
⇒ A 20 Ω resistor, a 1H inductor and 1μF capacitor are connected in parallel the combination is driven by a unit step current. Under the steady state, source current flows through
inductor
capacitor
resistor
all
⇒ The rate of change of excess carrier density is proportional to carrier density.
TRUE
FALSE
⇒ A photoconductor is a
conductor
semiconductor
insulator
superconductor
⇒ The ending part of the popular teleserial Mahabharat will be beamed to the viewers
WESTAT
INSAT-IC
ARABSAT
INSAT-ID
⇒ An electrolytic capacitor can be used for
ac only
dc only
both ac and dc
high frequency ac
⇒ Consider the following applications
1 2 and 3
l and 2 only
1 and 3 only
2 and 3 only
⇒ If a microcomputer has a 64 K memory; what is the hexadecimal notations for the last memory location?
1111
1A1A
EEEF
FFFF
⇒ Z = _______
C[A(B + C) + D]
(AB + AC + D)
(CA + AC + D)
none of these
⇒ In an R-L circuit excited by a battery of voltage E, the current and voltage across resistor are 1- e^{-t} and 2(1 - e^{-t}) respectively. If there were an initial current of 2 A in the inductance, the voltage across resistance would have been
1 - e^{-t}
2 - 2e^{-t}
2 + 2e^{-t}
4 - 4e^{-t}
⇒ Which of the following is not correct?
In SSB amplitude modulated system, the transmitter circuit has to be more stable leading to better reception
In SSB amplitude modulated system more channel space is available as compared to double sideband amplitude modulated system
In SSB amplitude modulated system the signal is more noise resistant as compared to double sideband system
An SSB-AM system requires lesser power (for the same signal strength) as compared to DSB-AM system
⇒ In a Karnaugh map for an expression having 'don't care terms' the don't cares can be treated as
0
1
1 or 0
none of the above
⇒ At a given probability of error, binary coherent FSK is interior to binary coherent PSK by
6 dB
3 dB
2 dB
0 dB
⇒ Four voltmeters have following specifications. If accuracy is main consideration which is the best?
100 V, 2 mA
100 V, 100 mA
100 V, 1 mA
100 V, 0.1 mA
⇒ In the given figure x_{6de(ax1 + bx2 + cx3)(a + b + c) (x1 + x2 + x3) (d + e)(ax1 + bx2 + cx3) (d + e)a b c d e (x1 + x2 + x3)}
⇒ Nichrome is commonly used for
lamp filaments
transformer winding
heater coils
battery connections
⇒ A JFET operates in ohmic region when
V_{GS} = 0
V_{GS} is less than pinch off voltage
V_{GS} = is Positive
V_{GS} = V_{DS}
⇒ In n channel JFET
I_{D} and V_{DS} are positive but V_{GS} is negative
I_{D} and V_{GS} are positive but V_{DS} is negative
V_{DS} and V_{GS} are positive but I_{D} is negative
I_{D}, V_{DS} and V_{GS} are all positive
⇒ The system of the given fi
has two poles and one zero in left half plane
has two poles and one zero in right half plane
has two poles in left half plane and zero in right half plane
none of the above
⇒ Without any addition circuitry, an 8:1 MUX can be used to obtain.
some but not all Boolean functions of 3 variables
all functions of 3 variables but none of 4 variables
all functions of 3 variables and some but not all of 4 variables
all functions of 4 variables
⇒ To select one out of N equally probable events, the number of bits required is
log_{2} N
log_{10} N
log_{e} N
N
⇒ The recently-introduces CD-ROM PC by Head Start Technologies Co. of New York enables users to view or play __________ .
vast amounts of text
graphics
music
all of the above
⇒ The noise performance of a square law demodulator of AM signal is
better than that of an envelope detector
better than that of a synchronous detector
identical with that of a synchronous detector
poorer than that of an envelope detector
⇒
A-4, B-2, C-3, D-1
A-1, B-3, C-2, D-4
A-2, B-1, C-4, D-3
A-3, B-1, C-4, D-2
⇒ The circuit of figur
positive clipper
negative clipper
combination clipper
either (a) or (b)
⇒ In a vibrating reed frequency meter the natural frequency of two adjacent reeds have a difference of
0.25 Hz
0.5 Hz
1.25 Hz
1 Hz
⇒
Assertion (A): Negative feedback reduces the bandwidth of an amplifier
Reason (R): Negative feedback stabilizes the gain of an amplifier
Both A and R are correct and R is correct explanation for A
Both A and R are correct but R is not correct explanation for A
A is correct R is wrong
A is wrong R is correct
⇒ In intrinsic semiconductor the increase in conductivity per degree increase in temperature is about
0.02
0.06
0.15
0.25
⇒ For an RC admittance function
all poles and zeros are simple
all poles and zeros are simple and lie on negative real axis
all poles and zeros lie on imaginary axis
all poles and zeros lie on positive real axis
⇒ For maximum unclipped output from a CE amplifier, the Q point should be
at the centre of dc load line
at the centre of ac load line
at the centre of collector current
none of the above
⇒ The tape recorders used in homes have
common head and common amplifier system for recording and playback
different heads and amplifiers for recording and playback
same head but different amplifiers for recording and playback
different heads but same amplifier for recording and playback
⇒ A 20 Ω resistor, a 1H inductor and 1μF capacitor are connected in parallel the combination is driven by a unit step current. Under the steady state, source current flows through
inductor
capacitor
resistor
all
⇒ The rate of change of excess carrier density is proportional to carrier density.
TRUE
FALSE
⇒ A photoconductor is a
conductor
semiconductor
insulator
superconductor
⇒ The ending part of the popular teleserial Mahabharat will be beamed to the viewers
WESTAT
INSAT-IC
ARABSAT
INSAT-ID
⇒ An electrolytic capacitor can be used for
ac only
dc only
both ac and dc
high frequency ac
⇒ Consider the following applications
- TV tuning
- Active filter
- Microwave frequency multiplication
1 2 and 3
l and 2 only
1 and 3 only
2 and 3 only
⇒ If a microcomputer has a 64 K memory; what is the hexadecimal notations for the last memory location?
1111
1A1A
EEEF
FFFF
⇒ Z = _______
C[A(B + C) + D]
(AB + AC + D)
(CA + AC + D)
none of these
⇒ In an R-L circuit excited by a battery of voltage E, the current and voltage across resistor are 1- e^{-t} and 2(1 - e^{-t}) respectively. If there were an initial current of 2 A in the inductance, the voltage across resistance would have been
1 - e^{-t}
2 - 2e^{-t}
2 + 2e^{-t}
4 - 4e^{-t}
⇒ Which of the following is not correct?
In SSB amplitude modulated system, the transmitter circuit has to be more stable leading to better reception
In SSB amplitude modulated system more channel space is available as compared to double sideband amplitude modulated system
In SSB amplitude modulated system the signal is more noise resistant as compared to double sideband system
An SSB-AM system requires lesser power (for the same signal strength) as compared to DSB-AM system
⇒ In a Karnaugh map for an expression having 'don't care terms' the don't cares can be treated as
0
1
1 or 0
none of the above
⇒ At a given probability of error, binary coherent FSK is interior to binary coherent PSK by
6 dB
3 dB
2 dB
0 dB
⇒ Four voltmeters have following specifications. If accuracy is main consideration which is the best?
100 V, 2 mA
100 V, 100 mA
100 V, 1 mA
100 V, 0.1 mA
⇒ In the given figure x_{6de(ax1 + bx2 + cx3)(a + b + c) (x1 + x2 + x3) (d + e)(ax1 + bx2 + cx3) (d + e)a b c d e (x1 + x2 + x3)}
⇒ Nichrome is commonly used for
lamp filaments
transformer winding
heater coils
battery connections
⇒ A JFET operates in ohmic region when
V_{GS} = 0
V_{GS} is less than pinch off voltage
V_{GS} = is Positive
V_{GS} = V_{DS}
⇒ In n channel JFET
I_{D} and V_{DS} are positive but V_{GS} is negative
I_{D} and V_{GS} are positive but V_{DS} is negative
V_{DS} and V_{GS} are positive but I_{D} is negative
I_{D}, V_{DS} and V_{GS} are all positive
⇒ The system of the given fi
has two poles and one zero in left half plane
has two poles and one zero in right half plane
has two poles in left half plane and zero in right half plane
none of the above
⇒ Without any addition circuitry, an 8:1 MUX can be used to obtain.
some but not all Boolean functions of 3 variables
all functions of 3 variables but none of 4 variables
all functions of 3 variables and some but not all of 4 variables
all functions of 4 variables
⇒ To select one out of N equally probable events, the number of bits required is
log_{2} N
log_{10} N
log_{e} N
N
⇒ The recently-introduces CD-ROM PC by Head Start Technologies Co. of New York enables users to view or play __________ .
vast amounts of text
graphics
music
all of the above
⇒ The noise performance of a square law demodulator of AM signal is
better than that of an envelope detector
better than that of a synchronous detector
identical with that of a synchronous detector
poorer than that of an envelope detector
⇒
Match the following:
List I (Instrument) | List II (Parameters) | ||
---|---|---|---|
A. | Moving coil galvanometer | 1. | High inertia, soft spring control |
B. | Ballistic galvanometer | 2. | No control, high damping |
C. | Vibration galvanometer | 3. | Soft spring control, critical damping |
D. | Moving coil flux meter | 4. | Low inertia, tuned spring control |
A-4, B-2, C-3, D-1
A-1, B-3, C-2, D-4
A-2, B-1, C-4, D-3
A-3, B-1, C-4, D-2
⇒ The circuit of figur
positive clipper
negative clipper
combination clipper
either (a) or (b)
⇒ In a vibrating reed frequency meter the natural frequency of two adjacent reeds have a difference of
0.25 Hz
0.5 Hz
1.25 Hz
1 Hz