For an SCR gate – cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance_____?

For an SCR gate – cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance_____?

A. 111.9 Ω.
B. 11.19 Ω.
C. 108 Ω.
D. 115 Ω

In forward blocking mode of a thyristor________?

In forward blocking mode of a thyristor________?

A. junction J2 is in reverse bias and J1, J3 is in forward bias.
B. junction J3 is in forward bias and J1, J2 is in reverse bias.
C. Junction J1, J3 is in reverse bias and J2 is in forward bias.
D. Junction J1 and J2 is in forward bias and J3 is in reverse bias.

In reverse blocking mode of a thyristor______?

In reverse blocking mode of a thyristor______?

A. junction J2 is in reverse bias and J1, J3 is in forward bias.
B. junction J3 is in forward bias and J1, J2 in reverse bias.
C. junction J1, J3 is in reverse bias and J2 is in forward bias.
D. junction J1 and J2 is in forward bias and J3 is in reverse bias.

A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is _____?

A single phase one pulse controlled circuit has a resistance R and counter emf E load 400 sin(314 t) as the source voltage. For a load counter emf of 200 V, the range of firing angle control is _____?

A. 30° to 150°.
B. 30° to 180°.
C. 60° to 120°.
D. 60° to 180°.