Circuit turn-off time of an SCR is defined as the time

The L-C circuit shown in the figure has an impedance L = I mH and a capacitance C = 10uF.

The LC circuit shown in the figure has an inductance  and capacitance . The LC circuit is used to commutate a thyristor, which is initially carrying a current of 5A as shown in the figure below. The values and initial of  and  are same as in previous question. The switch is closed ae . If the forward drop is negligible, the time taken for the device to turn off is

The circuit in the figure is a current commutated dc-dc chopper where. is the main SCR and is the auxiliary SCR. The load current is constant at 10A. is ON.  is triggered at t = 0. is turned OFF between

A voltage commutation circuit is shown in figure.  If the turn off time of the SCRs is 50µ sec and a safety margin of 2 is considered, then what will be the approximate minimum value of capacitor required for proper commutation?

In a commutation circuit employed to turn off an SCR, satisfactory turn-off is obtained when

If a diode is connected in anti-parallel with a thyristor, then

Which of the following does not cause permanent damage of an SCR?

Figure, show two thyristors each rated 500A (continuous) sharing a load current. Current through thyristor Y is 120A. The current through thyristor X will be nearly ______________ A.

Match the functions of the following protective elements in SCR applications: