The phase angle of gate signal in TRIAC can be shifted by using_____________?

Related Mcqs:

1. 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...

2. AC power in a load can be controlled by using_____________?

   A. two SCR’s in parallel opposition B. two SCR’s in series C. three SCR’s in series D. four SCR’s in series...

3. Any electrical signal present in a circuit other than the desired signal is known as______________?

   A. Noise B. Distortion C. Interference D. All of these...

4. A Triac is a ______________?

   A. 2 terminal switch B. 2 terminal bilateral switch C. 3 terminal bilateral switch D. 3 terminal bidirectional switch...

5. A Triac has three terminals viz ___________?

   A. Drain, source, gate B. Two main terminal and a gate terminal C. Cathode, anode, gate D. None of the above...

6. TRIAC is a semiconductor power electronic device which contains____________?

   A. Two SCR’s connected in reverse parallel B. Two SCR’s connected in parallel C. Two SCR’s connected in series D. Two BJT’s connected in series...

7. DIAC and TRIAC both are semiconductors devices and conduct in____________________?

   A. DIAC conducts in forward direction and TRIAC conducts in reverse direction B. Both conducts in forward direction C. Both conducts in reverse direction D. Both conducts in either direction...

8. A TRIAC can be turned on with______________?

   A. Positive voltage at the gate terminal B. Negative voltage at the gate terminal C. Either (a) or (b) D. None of these...

9. In a 3 phase VSI SPWM to use a single carrier signal and preserve the features of PWM technique, the normalized carrier frequency should be____________?

   A. Multiple of two B. Odd multiple of three C. Odd multiple of five D. Odd multiple of seven...

10. 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°....