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Assertion (A): Silicon is the most favoured semiconductor material. Reason (R): PIV for silicon diode is more than that for germanium diode. | |
A. | Both A and R are true and R is correct explanation of A [Wrong Answer] |
B. | Both A and R are true but R is not correct explanation of A [Wrong Answer] |
C. | A is true but R is false [Correct Answer] |
D. | A is false but R is true [Wrong Answer] |
View Answer
Explanation:-
Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ Which of the following is true?
During addition if the carry into and carry out of the sign bit do not match then an overflow has occurred
During addition if the carry into and carry out of the sign bit don't match then an overflow or underflow has occurred
During addition if the carry into and carry out of the sign bit match then an overflow or underflow has occurred
During addition if the carry into and carry out of the sign bit match then an overflow has occurred
⇒ A meter has a resistance of 1 Ω and full scale deflection current of 1 mA. To convert into an ammeter of 1 A range, the shunt resistance should be
1000 Ω
1 Ω
0.01 Ω
0.001 Ω
⇒
Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
⇒ If the Q of a single-stage single-tuned amplifier is doubled, then its bandwidth will
remain same
become half
become doubled
become four times
⇒ Frequency modulation consists in
varying the frequency and amplitude of the carrier in accordance with the instantaneous value of modulating signal
varying the amplitude of the carrier in accordance with the instantaneous value of the modulating voltage
varying the frequency of the carrier voltage in accordance with the instantaneous value of the modulating voltage
vary the frequency of the carrier voltage
⇒ A rectangular waveguide measures 3 x 4.5 cm internally and has a 10 GHz signal propagated in it. Calculate the guide wavelength for dominant mode.
13.5 m
3 m
88/3 m
3/88 m
⇒ A communication channel disturbed by additive white, Gaussian noise has a bandwidth of 4 kHz and SNR of 15. The highest transmission rate that this channel can support (in k bits/sec) is
16
1.6
3.2
60
⇒ Two port circuits are connected in parallel. To determine the response, it is more convenient to use
O.C. impedance parameters
S.C. admittance parameters
ABCD parameters
h parameters
⇒ If a sound wave has a frequency of 50 Hz, the wavelength is
66 m
6.6 m
0.66 m
0.066 m
⇒ The term VLSI generally refers to a digital IC having
more than 1000 gates
more than 100 gates
more than 1000 but less than 9999 gates
more than 100 but less than 999 gates
⇒ Manganin, an alloy of copper and manganese, is used in
Soldering material
Heating elements
Ballast resistors
Standard resistances
⇒ A NOR gate has 3 inputs A, B, C. For which combination of inputs is output HIGH
A = B = C = 0
A = B = C = 1
A = B = 1 and C = 0
A = C = 1 and B = 0
⇒ A 3 phase induction motor is fed by a 3 phase ac regulator to change the stator voltage. The variation in speed will be more if
load torque is constant
load torque increases with increase in speed
load torque decreases with increase in speed
either (a) or (b)
⇒ In the switching circuit, switches A, B have value 0 for OFF, 1 for ON and the output Y has 0 volts for 1 volts, then the expression for
AB
A + B
A + B
AB
⇒ Evaluate the power stored in inductor and capac
25 J, 12.5 J
12.5 J, 25 J
25 J, 50 J
12.5 J, 50 J
⇒ For a P-N junction diode, the current in reverse bias may be
few amperes
between 0.5 A and 1 A
few milliamperes
few micro or nanoamperes
⇒ The number of spectral component of a cosine wave is
1
0
2
4
⇒ The resistance of a dc galvanometer is 20 Ω. A current of 10 mA causes full scale deflection. To convert it into 0-300 V voltmeter, we have to use a series resistance of
30000 Ω
29980 Ω
6000 Ω
15 Ω
⇒ A parallel plate capacitor having C = 200 x 10^{-12} F has loss dielectric having tan δ = 4 x 10^{-4}. At an ac voltage of f = 10^{6} Hz and peak value 2 V, the dielectric losses are
10^{-8} W
10^{-6} W
10^{-4} W
10^{-2} W
⇒ Geosynchronous satellites are always launched in the equatorial plane because it is the only plane which provides
24-hour orbit
stationary satellite
global communication
zero-gravity environs
⇒ When the carrier is unmodulated, a certain transmitter radiates 9 kW when the carrier is sinusoidally modulated the transmitter radiates 10.125 kW. The modulation index will be
0.1
10.15
0.4
0.5
⇒ Which of the following is a valid FORTRAN assignment statement?
10 = N
X + 2.1 = 5.6
A = B
A = B = 1
⇒ An instruction used to set cany flag in a computer is classified as
data transfer
arithmetic
logical
program control
⇒ 71_{8} = __________ .
111000_{2}
111001_{2}
100001_{2}
110001_{2}
⇒ Two resistances are : R_{1} = 36 Ω ± 1.89 Ω and R_{2} = 75 Ω ± 3.75 Ω. The sum R_{1} + R_{2} along with limiting error is
111 Ω ± 1.8 Ω
111 Ω ± 3.75 Ω
111 Ω ± 5.55 Ω
111 Ω ± 1.95 Ω
⇒ In active filters inductances are divided because they
are always associated with same resistance
are bulky and unsuitable for miniaturization
are non linear
saturate quickly
⇒ The loss of charge method can be used to measure
resistance of shunt
insulation resistance of cable
resistance of shunt winding
both (b) and (c)
⇒ The circuit of the given figure realizes the func
Y = (A + B) C + DE
Y = A + B + C + D + E
AB + C +DE
AB + C(D + E)
⇒ The hexadecimal number 'A0' has the decimal value
80
256
100
160
⇒ Recommended fanout for ECL is
5
10
15
25
⇒ Which of the following is true?
During addition if the carry into and carry out of the sign bit do not match then an overflow has occurred
During addition if the carry into and carry out of the sign bit don't match then an overflow or underflow has occurred
During addition if the carry into and carry out of the sign bit match then an overflow or underflow has occurred
During addition if the carry into and carry out of the sign bit match then an overflow has occurred
⇒ A meter has a resistance of 1 Ω and full scale deflection current of 1 mA. To convert into an ammeter of 1 A range, the shunt resistance should be
1000 Ω
1 Ω
0.01 Ω
0.001 Ω
⇒
Assertion (A): FET is a unipolar device.
Reason (R): BJT is bipolar device.
Both A and R are true and R is correct explanation of A
Both A and R are true but R is not a correct explanation of A
A is true but R is false
A is false but R is true
⇒ If the Q of a single-stage single-tuned amplifier is doubled, then its bandwidth will
remain same
become half
become doubled
become four times
⇒ Frequency modulation consists in
varying the frequency and amplitude of the carrier in accordance with the instantaneous value of modulating signal
varying the amplitude of the carrier in accordance with the instantaneous value of the modulating voltage
varying the frequency of the carrier voltage in accordance with the instantaneous value of the modulating voltage
vary the frequency of the carrier voltage
⇒ A rectangular waveguide measures 3 x 4.5 cm internally and has a 10 GHz signal propagated in it. Calculate the guide wavelength for dominant mode.
13.5 m
3 m
88/3 m
3/88 m
⇒ A communication channel disturbed by additive white, Gaussian noise has a bandwidth of 4 kHz and SNR of 15. The highest transmission rate that this channel can support (in k bits/sec) is
16
1.6
3.2
60
⇒ Two port circuits are connected in parallel. To determine the response, it is more convenient to use
O.C. impedance parameters
S.C. admittance parameters
ABCD parameters
h parameters
⇒ If a sound wave has a frequency of 50 Hz, the wavelength is
66 m
6.6 m
0.66 m
0.066 m
⇒ The term VLSI generally refers to a digital IC having
more than 1000 gates
more than 100 gates
more than 1000 but less than 9999 gates
more than 100 but less than 999 gates
⇒ Manganin, an alloy of copper and manganese, is used in
Soldering material
Heating elements
Ballast resistors
Standard resistances
⇒ A NOR gate has 3 inputs A, B, C. For which combination of inputs is output HIGH
A = B = C = 0
A = B = C = 1
A = B = 1 and C = 0
A = C = 1 and B = 0
⇒ A 3 phase induction motor is fed by a 3 phase ac regulator to change the stator voltage. The variation in speed will be more if
load torque is constant
load torque increases with increase in speed
load torque decreases with increase in speed
either (a) or (b)
⇒ In the switching circuit, switches A, B have value 0 for OFF, 1 for ON and the output Y has 0 volts for 1 volts, then the expression for
AB
A + B
A + B
AB
⇒ Evaluate the power stored in inductor and capac
25 J, 12.5 J
12.5 J, 25 J
25 J, 50 J
12.5 J, 50 J
⇒ For a P-N junction diode, the current in reverse bias may be
few amperes
between 0.5 A and 1 A
few milliamperes
few micro or nanoamperes
⇒ The number of spectral component of a cosine wave is
1
0
2
4
⇒ The resistance of a dc galvanometer is 20 Ω. A current of 10 mA causes full scale deflection. To convert it into 0-300 V voltmeter, we have to use a series resistance of
30000 Ω
29980 Ω
6000 Ω
15 Ω
⇒ A parallel plate capacitor having C = 200 x 10^{-12} F has loss dielectric having tan δ = 4 x 10^{-4}. At an ac voltage of f = 10^{6} Hz and peak value 2 V, the dielectric losses are
10^{-8} W
10^{-6} W
10^{-4} W
10^{-2} W
⇒ Geosynchronous satellites are always launched in the equatorial plane because it is the only plane which provides
24-hour orbit
stationary satellite
global communication
zero-gravity environs
⇒ When the carrier is unmodulated, a certain transmitter radiates 9 kW when the carrier is sinusoidally modulated the transmitter radiates 10.125 kW. The modulation index will be
0.1
10.15
0.4
0.5
⇒ Which of the following is a valid FORTRAN assignment statement?
10 = N
X + 2.1 = 5.6
A = B
A = B = 1
⇒ An instruction used to set cany flag in a computer is classified as
data transfer
arithmetic
logical
program control
⇒ 71_{8} = __________ .
111000_{2}
111001_{2}
100001_{2}
110001_{2}
⇒ Two resistances are : R_{1} = 36 Ω ± 1.89 Ω and R_{2} = 75 Ω ± 3.75 Ω. The sum R_{1} + R_{2} along with limiting error is
111 Ω ± 1.8 Ω
111 Ω ± 3.75 Ω
111 Ω ± 5.55 Ω
111 Ω ± 1.95 Ω
⇒ In active filters inductances are divided because they
are always associated with same resistance
are bulky and unsuitable for miniaturization
are non linear
saturate quickly
⇒ The loss of charge method can be used to measure
resistance of shunt
insulation resistance of cable
resistance of shunt winding
both (b) and (c)
⇒ The circuit of the given figure realizes the func
Y = (A + B) C + DE
Y = A + B + C + D + E
AB + C +DE
AB + C(D + E)
⇒ The hexadecimal number 'A0' has the decimal value
80
256
100
160
⇒ Recommended fanout for ECL is
5
10
15
25