164. A SCR fires at a minimum current of 80 mA and ? 65 ?C. The minimum current required to fire at 25?C is
165. An SCR is rated at 75 A peak, 20 A average. The gre astest possible delay in the trigger angle if the dc is a rated value is
166. A SCR has an anode supply of sine voltage 200 V rms., 50 Hz applied through a 1000 resistor and fired at an angle of 60?. Assuming no voltage drop, the rms value of the output voltage is
167. A dc source of 100 V supplies a purely inductive load 0.1 H. The controller is a thyristor in series with the source and load. The latching current specified is 100 mA. The minimum width of the gating pulse to ensure thyristor turn on is
168. A thyristor is triggered by apulse train of 5 KHz. The duty ratio is 0.4. If the allowable averaige power is 100 W. The maximum allowable gate drive power is
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