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Assertion (A): A high dv/dt may cause triggering of a thyristor. Reason (R): A high dv/dt results in charging current in the thyristor. | |
A. | Both A and R are correct and R is correct explanation of A [Correct Answer] |
B. | Both A and R correct but R is not correct explanation of A [Wrong Answer] |
C. | A is correct but R is wrong [Wrong Answer] |
D. | A is wrong but R is correct [Wrong Answer] |
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Explanation:-
Answer : A Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ A voltage v = 100 sin ωt + 10 sin 5 ωt is applied to a pure capacitor having capacitance of 1 μF. If ω = 314 rad/sec, the current through the capacitor is
0.0314 cos 314 t + 0.0157 cos 1570 t
0.0314 sin 314 t + 0.0157 sin 1570 t
0.0314 cos 314 t + 0.0314 cos 1570 t
0.0157 cos 314 t + 0.0157 cos 1570 t
⇒ If PRIN = 200.0 and BINT = 0.0525 the result of expression
210
210.5
210.5
210.5
⇒ Three phase four wire induction energy meter is used to measure
energy in 3 phase balanced star load
energy in 3 phase balanced delta load
energy in 3 phase unbalanced load
either (a) or (b)
⇒ In the equivalent circuit of a moving coil cone type loudspeaker, the mass of the moving system is represented by
a resistance
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a conductance
⇒ Figure represen
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Temperature dependent diode
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A-4, B-3, C-2, D-1
A-1, B-2, C-3, D-4
A-3, B-4, C-2, D-1
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⇒ A sinusoidal voltage of 2 kV peak value is amplitude modulated to give 20% modulation. The peak value of each side band term is
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⇒ The ideal voltmeter V of figure will read __________ v
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2
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⇒ What is the characteristic impedance at 10 MHz?
547.7 Ω
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⇒ The conductivity of an intrinsic semiconductor is (symbols have the usual meanings).
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σ_{i} = en_{i} (μ_{n} - μ_{p})
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⇒ Two infinitely long wires carrying current are as shown in the figure below. One wire is in the y-z plane and parallel to the y-axis. The other wise is in the x-y plane and parallel to the x-axis. Which components of the resulting magnetic field are non-zero at the ori
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⇒ At very low frequencies a series R-C circuit behaves as almost purely __________ .
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⇒ The conductivity of an intrinsic semiconductor is
generally less than that of a doped semiconductor
given by σ_{1} = en_{i} (μ_{n} - μ_{p})
given by σ_{1} = en_{i} (μ_{p} + μ_{n})
given by σ_{1} = n_{i} (μ_{n} + μ_{p})
⇒ 5 skilled workers can build a wall in 20 days; 8 semi-skilled worker can build a wall in 25days; 10 unskilled workers can build a wall in 30 days, If a team has 2 killed, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall?
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25722
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0.125
0.0416666666666667
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0
⇒ In case of static storage elements
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⇒ Ac signals are given to both inverting and non-inverting terminals of an op-amp. When will the output maximum
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⇒ A voltage v = 100 sin ωt + 10 sin 5 ωt is applied to a pure capacitor having capacitance of 1 μF. If ω = 314 rad/sec, the current through the capacitor is
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210.5
210.5
⇒ Three phase four wire induction energy meter is used to measure
energy in 3 phase balanced star load
energy in 3 phase balanced delta load
energy in 3 phase unbalanced load
either (a) or (b)
⇒ In the equivalent circuit of a moving coil cone type loudspeaker, the mass of the moving system is represented by
a resistance
a capacitance
an inductance
a conductance
⇒ Figure represen
Varactor
LED
Zener diode
Temperature dependent diode
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Match the following:
List I (Camera pick up tubes) | List II (Special feature) | ||
---|---|---|---|
A. | Vidicon | 1. | Highest sensitivity |
B. | Plumbicon | 2. | Temperature sensitive |
C. | Saticon | 3. | Large lag |
D. | New vicon | 4. | Special target for red response |
A-4, B-3, C-2, D-1
A-1, B-2, C-3, D-4
A-3, B-4, C-2, D-1
A-4, B-3, C-1, D-2
⇒ A sinusoidal voltage of 2 kV peak value is amplitude modulated to give 20% modulation. The peak value of each side band term is
400 V
200 V
100 V
800 V
⇒ The ideal voltmeter V of figure will read __________ v
0
10
5
1
⇒ The number of leads in a DIAC are
2
3
4
6
⇒ What is the characteristic impedance at 10 MHz?
547.7 Ω
54.7 Ω
5.47 Ω
.547 Ω
⇒ The conductivity of an intrinsic semiconductor is (symbols have the usual meanings).
generally less than that a doped semiconductor
σ_{i} = en_{i} (μ_{n} - μ_{p})
σ_{i} = en_{i} (μ_{n} + μ_{p})
σ_{i} = n_{i} (μ_{n} - μ_{p})
⇒ In figure the number of tree branches and links respectively
3 and 2
1 and 3
4 and 1
1 and 4
⇒ Two infinitely long wires carrying current are as shown in the figure below. One wire is in the y-z plane and parallel to the y-axis. The other wise is in the x-y plane and parallel to the x-axis. Which components of the resulting magnetic field are non-zero at the ori
x, y, z components
x, y components
y, z components
x, z components
⇒ At very low frequencies a series R-C circuit behaves as almost purely __________ .
resistive
inductive
capacitive
none of the above
⇒ The conductivity of an intrinsic semiconductor is
generally less than that of a doped semiconductor
given by σ_{1} = en_{i} (μ_{n} - μ_{p})
given by σ_{1} = en_{i} (μ_{p} + μ_{n})
given by σ_{1} = n_{i} (μ_{n} + μ_{p})
⇒ 5 skilled workers can build a wall in 20 days; 8 semi-skilled worker can build a wall in 25days; 10 unskilled workers can build a wall in 30 days, If a team has 2 killed, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall?
20 days
18 days
16 days
15 days
⇒ In a 50 cm TV tube, a path difference of 2 km between direct wave and interfering wave would mean a displacement between main image and ghost image equal to
0.3 cm
3 cm
6 cm
9 cm
⇒ A current tracer responds to
steady current only
pulsating current only
both pulsating and steady current
none of the above
⇒ Triatics are
small height antenna directly mounted on jeeps, ships, etc.
the towers or masts which are used as radiators
the towers or masts which are not used as radiators
supports for antenna conductors.
⇒ A 4 cm by 3 cm rectangular waveguide with air cavity, is operating at 12 GHz with TE_{11} mode. The cut-off frequency is:
6.25 GHz
4.75 GHz
1.5 GHz
8.75 GHz
⇒ A 7477 decoder drives
seven-segment display
nickel tape
relays
diode matrix
⇒ A delta connection contains three impedances of 60 Ω each. The impedances of equivalent star connection will be
15 Ω
20 Ω
30 Ω
40 Ω
⇒ Consider the following statement: In case of a superconductor
- B = 0
- μ_{r} is high
- diamagnetism is high
- transition temperature varies with isotopic mass.
1 and 2 are correct
2, 3, 4 are correct
1, 3, 4 are correct
2, 4 are correct
⇒ In which of the following does a negative resistance region exist in the v-i characteristics?
PIN diode
Schottky diode
Tunnel diode
Zener diode
⇒ The hexadecimal number 64 AC is equivalent to decimal number
25727
25722
25772
25777
⇒ Find I for circuit shown b
0.125
0.0416666666666667
0.0833333333333333
0
⇒ In case of static storage elements
information is permanently stored
information is to be periodically refreshed
information is to be intermittently refreshed
information is lost in case power is removed
⇒ The bandwidth required for amplitude modulation is
half the frequency of modulating signal
equal to the frequency of modulating signal
twice the frequency of modulating signal
four times the frequency of modulating signal
⇒ Ac signals are given to both inverting and non-inverting terminals of an op-amp. When will the output maximum
when the phase difference between the inputs is 0°
when the phase difference between the inputs in 90°
when the phase difference between the inputs is 180°
when the phase difference between the inputs is 0 or 180°
⇒ The minimum energy of a photon required for intrinsic excitation is equal to
energy of bottom of conduction band
energy of top of valence band
forbidden gap energy
Fermi energy