51. How is the GTO turned off?
52. A power diode has lightly doped n type substrate sandwiched between heavily doped p and n regions
53. An SCR has an anode supply of sine voltage 200 Vr.m.s, 50 Hz applied through a 100 Ω resistor and fired at an angle of 60°. Assuming no voltage drop, the r.m.s. value of the output voltage is nearly
54. In the forward blocking region of a silicon controlled rectifier, the SCR is
55. An SCR is sometimes called . . . . . . . .
56. Between the peak point and the valley point of UJT emitter characteristics we have . . . . . . . . region
57. The electronic circuit that converts AC to DC where the DC output peak value can be greater than the AC input peak value is-
58. A step down chopper is operated in the continuous conduction mode in steady state with constant duty ratio D. If Vo is the magnitude of the DC output voltage and if Vs is the magnitude of the DC input voltage, the ratio $$\frac{{{{\text{V}}_{\text{o}}}}}{{{{\text{V}}_{\text{s}}}}}$$ is given by
59. In thyristor, holding current is
60. Which one of the following can be used in the lighting system for power interruptions?
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