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Assertion (A): The reverse current in a p-n junction is nearly constant. Reason (R): The reverse breakdown voltage of a p-n diode depends on the extent of doping. | |
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 a correct explanation of A [Correct 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 : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ The trigonometric Fourier series for the waveform f(t) shown below con
only cosine terms and zero value for the dc component
only cosine terms and a positive value for the dc component
only cosine terms and a negative value for the dc component
only sine terms and a negative for the dc component
⇒ An extrinsic semiconductor sample has 6 billion silicon atoms and 3 million pentavalent impurity atoms. The number of electrons and holes is
3 million each
6 billion each
3 million free electrons and very small number of holes
3 million holes and very small number of free electrons
⇒ In 8421 Binary coded Decimal system the decimal number 237 is represented by
1000110111
1000111110
1000110111
10010010011
⇒ For addition and subtraction operations, phasors
must be represented in polar form
must be represented in rectangular form
may be represented in any form
none of the above
⇒ If F(t) = δ(t - a), F(s)=
0
1
e^{-as}
e^{as}
⇒ The real part of complex frequency s corresponds to oscillations.
TRUE
FALSE
⇒ In a one pole active low pass filter, the cut off frequency is f_{c}. Then
gain decreases at the rate of 20 dB per decade increase in frequency above f_{c}
gain decreases at the rate of 20 dB per decade decrease in frequency below f_{c}
gain decreases at the rate of 40 dB per decade increase in frequency above f_{c}
gain decreases at the rate 40 dB per decade decrease in frequency below f_{c}
⇒ Which of the following conversion is incorrect?
2048.0625 = 100000000000.0001_{2}
100000011.1001_{2} = 131.5625_{10}
101101_{2} = 45_{8}
Hexadecimal B6C_{7} = 46791_{10}
⇒ In the circuit shown in the given figure the diode states at the extremely large negative values of the input voltage v_{i} a
D_{1} off, D_{2} off
D_{1} on, D_{2} off
D_{1} off, D_{2} on
D_{1} on, D_{1} on, D_{2} on
⇒ The poles with greater displacement from the real axis correspond to
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stable response
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unbounded output
⇒ In practical commercial FM system, channel bandwidth is
150 kHz
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⇒ In the design of a single mode step index optical fiber close to upper cut-off, the single mode operations is NOT preserved if
radius as well as operating wavelength are halved
radius as well as operating wavelength are doubled
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⇒ In TV systems, equalising pulses are sent during
horizontal blanking
vertical blanking
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⇒ The PCM signal shown below uses amplitude level of +1 volt and -1 volt to represent binary symbol 0 and 1 respectively. Each code word consists of 4 bits. The sampled version of analog signal from which this PCM signal is derived
EB596
CD231
DA495
25B6A
⇒ The power dissipated in 4 Ω resistance in figur
64 W
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⇒ In an AM wave the carrier and one of the side bands is suppressed. If m = 1, the percentage saving in power is
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6 / 4 = 1
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⇒ The total field developed by an antenna array at a distant point is
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algebraic sum of fields produced by individual antennas of the array
either (a) or (b) depending on type of array
neither (a) nor (b)
⇒ In a single phase full wave regulator feeding R-L load, short gate pulse are not suitable.
TRUE
FALSE
⇒ The circuit show in the figure has 4 boxes each described by inputs P, Q, R and outputs y, z
4 bit adder giving P + Q
4 bit subtractor P - Q
4 bit subtractor Q - P
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⇒ The maximum temperature limit of class B insulation is
90°C
105°C
120°C
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⇒
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
⇒ In a self bias circuit for CE amplifier, an increase in emitter resistance R_{E} results in
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decrease in emitter voltage
increase in emitter current
decrease in emitter current
⇒ A seven bit (even parity) code 0010001 may have error. The correct code is
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1110001
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1111110
⇒ As compared to a bipolar transistor, a JFET is
highly sensitive to changes in input voltage
more sensitive to changes in input voltage
less sensitive to changes in input voltage
equally sensitive to changes in input voltage
⇒ All digital circuits can be realised using only
EX-OR gates
Multiplexers
Half adders
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⇒ For the wave shown in figure, the average valu
14.14 A
15 A
17.17 A
19.19 A
⇒ If there are M equally likely and independent messages and M = 2^{N} where N is an integer, the information in each message is equal to
N bits
0.5 N bits
2 N bits
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⇒ D-layer extends approximately from
50 to 90 km
20 to 50 km
90 to 110 km
up to 50 km
⇒ For a short dipole having an effective length less than half the wavelength the radiation resistance is
proportional to length
proportional to square root of length
proportional to square of length
none of the above
⇒ The trigonometric Fourier series for the waveform f(t) shown below con
only cosine terms and zero value for the dc component
only cosine terms and a positive value for the dc component
only cosine terms and a negative value for the dc component
only sine terms and a negative for the dc component
⇒ An extrinsic semiconductor sample has 6 billion silicon atoms and 3 million pentavalent impurity atoms. The number of electrons and holes is
3 million each
6 billion each
3 million free electrons and very small number of holes
3 million holes and very small number of free electrons
⇒ In 8421 Binary coded Decimal system the decimal number 237 is represented by
1000110111
1000111110
1000110111
10010010011
⇒ For addition and subtraction operations, phasors
must be represented in polar form
must be represented in rectangular form
may be represented in any form
none of the above
⇒ If F(t) = δ(t - a), F(s)=
0
1
e^{-as}
e^{as}
⇒ The real part of complex frequency s corresponds to oscillations.
TRUE
FALSE
⇒ In a one pole active low pass filter, the cut off frequency is f_{c}. Then
gain decreases at the rate of 20 dB per decade increase in frequency above f_{c}
gain decreases at the rate of 20 dB per decade decrease in frequency below f_{c}
gain decreases at the rate of 40 dB per decade increase in frequency above f_{c}
gain decreases at the rate 40 dB per decade decrease in frequency below f_{c}
⇒ Which of the following conversion is incorrect?
2048.0625 = 100000000000.0001_{2}
100000011.1001_{2} = 131.5625_{10}
101101_{2} = 45_{8}
Hexadecimal B6C_{7} = 46791_{10}
⇒ In the circuit shown in the given figure the diode states at the extremely large negative values of the input voltage v_{i} a
D_{1} off, D_{2} off
D_{1} on, D_{2} off
D_{1} off, D_{2} on
D_{1} on, D_{1} on, D_{2} on
⇒ The poles with greater displacement from the real axis correspond to
higher frequencies of oscillation
stable response
lower frequencies of oscillation
unbounded output
⇒ In practical commercial FM system, channel bandwidth is
150 kHz
100 kHz
88 MHz
108 MHz
⇒ In the design of a single mode step index optical fiber close to upper cut-off, the single mode operations is NOT preserved if
radius as well as operating wavelength are halved
radius as well as operating wavelength are doubled
radius is halved and operating wavelength is doubled
radius is doubled and operating wavelength is halved
⇒ In TV systems, equalising pulses are sent during
horizontal blanking
vertical blanking
serrations
horizontal retrace
⇒ The PCM signal shown below uses amplitude level of +1 volt and -1 volt to represent binary symbol 0 and 1 respectively. Each code word consists of 4 bits. The sampled version of analog signal from which this PCM signal is derived
EB596
CD231
DA495
25B6A
⇒ The power dissipated in 4 Ω resistance in figur
64 W
32 W
16 W
8 W
⇒ In an AM wave the carrier and one of the side bands is suppressed. If m = 1, the percentage saving in power is
0.25
0.5
0.666
0.833
⇒ Which of the following is not correct in C?
6 / 4 = 1
2 / 5 = 0
2.0 / 5 = 0
2.0 / 5.0 = 0.4
⇒ The total field developed by an antenna array at a distant point is
phasor sum of fields produced by individual antennas of the array
algebraic sum of fields produced by individual antennas of the array
either (a) or (b) depending on type of array
neither (a) nor (b)
⇒ In a single phase full wave regulator feeding R-L load, short gate pulse are not suitable.
TRUE
FALSE
⇒ The circuit show in the figure has 4 boxes each described by inputs P, Q, R and outputs y, z
4 bit adder giving P + Q
4 bit subtractor P - Q
4 bit subtractor Q - P
4 bit adder P + Q + R
⇒ The maximum temperature limit of class B insulation is
90°C
105°C
120°C
130°C
⇒
Assertion (A): The variable name 5KING is not valid in Fortran 77.
Reason (R): In Fortran 77 the first character of a variable name must be an alphabet.
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
⇒ In a self bias circuit for CE amplifier, an increase in emitter resistance R_{E} results in
increase in emitter voltage
decrease in emitter voltage
increase in emitter current
decrease in emitter current
⇒ A seven bit (even parity) code 0010001 may have error. The correct code is
10001
1110001
11001
1111110
⇒ As compared to a bipolar transistor, a JFET is
highly sensitive to changes in input voltage
more sensitive to changes in input voltage
less sensitive to changes in input voltage
equally sensitive to changes in input voltage
⇒ All digital circuits can be realised using only
EX-OR gates
Multiplexers
Half adders
OR gates
⇒ For the wave shown in figure, the average valu
14.14 A
15 A
17.17 A
19.19 A
⇒ If there are M equally likely and independent messages and M = 2^{N} where N is an integer, the information in each message is equal to
N bits
0.5 N bits
2 N bits
4 N bits
⇒ D-layer extends approximately from
50 to 90 km
20 to 50 km
90 to 110 km
up to 50 km
⇒ For a short dipole having an effective length less than half the wavelength the radiation resistance is
proportional to length
proportional to square root of length
proportional to square of length
none of the above