Virtual Labs

To plot the V-I characteristic curve of a TRIAC and study its behavior during both positive and negative cycles of AC voltage

1. Which of the following electronic devices is used for stator voltage control in fan regulators?

a: TRIAC Explanation

Explanation

b: BJT Explanation

Explanation

c: MOSFET Explanation

Explanation

d: Diode Explanation

Explanation

2. MT1, MT2, and GATE are the terminals of which of the following power electronics device?

a: DIAR Explanation

Explanation

b: SCR Explanation

Explanation

c: TRIAC Explanation

Explanation

d: GTO Explanation

Explanation

3. The V-I characteristic curve of a TRIAC is symmetrical, showing operation in both the first quadrant (positive voltage and current) and the third quadrant (negative voltage and current). What characteristic of the TRIAC does this symmetry fundamentally represent?

a: It is a bidirectional semiconductor switch. Explanation

Explanation

b: It can only be triggered by a positive gate pulse. Explanation

Explanation

c: It is a unidirectional semiconductor switch. Explanation

Explanation

d: It has a high forward voltage drop. Explanation

Explanation

4. In the study of the TRIAC characteristic curve, what is the difference between the Latching Current and the Holding Current ?

a: Holding Current is required to turn the device ON, and Latching Current is required to turn it OFF. Explanation

Explanation

b: Latching Current is the minimum current required to maintain conduction after the gate pulse is removed, and Holding Current is the minimum current below which the device turns OFF. Explanation

Explanation

c: Latching Current is typically much smaller than Holding Current. Explanation

Explanation

d: Latching Current only applies to the negative half-cycle, and Holding Current only to the positive half-cycle. Explanation

Explanation