81. |
In a single-phase half-wave circuit with RL load, and a freewheeling diode across the load, extinction angle β is more than π. For a firing angle a, the SCR and freewheeling diode would conduct, respectively, for
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Answer:
Option (c) |
82. |
In a single-phase one-pulse circuit with RL load and a freewheeling diode, extinction angle β is less than π. For a firing angle a, the SCR and freewheeling diode would, respectively, conduct for
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Answer:
Option (a) |
83. |
A single-phase full-wave mid-point thyristor converter uses a 230/200 V transformer with center tap on the secondary side. The P.I.V. per thyristor is
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Answer:
Option (d) |
84. |
In a single-phase full converter bridge, the average output voltage is given by
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Answer:
Option (c) |
85. |
In a single-phase semiconverter, the average output voltage is given by
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Answer:
Option (c) |
86. |
In a single-phase full converter, for continuous conduction, each pair of SCRs conduct for
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Answer:
Option (b) |
87. |
In controlled rectifiers, the nature of load current, i.e. whether load current is continuous or discontinuous
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Answer:
Option (b) |
88. |
In a single-phase full converter, if output voltage has peak and average values of 325 V and 133 V respectively, then the firing angle is
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Answer:
Option (c) |
89. |
In a single-phase semiconverter, if output voltage has peak and average values of 325 V and 133 V respectively, the firing angle is
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Answer:
Option (c) |
90. |
Each diode of a 3-phase half-wave diode rectifier conducts for
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Answer:
Option (b) |