Explore topic-wise MCQs in Power Electronics.

This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Power Electronics knowledge and support exam preparation. Choose a topic below to get started.

1.

In case of a R firing circuit with Vgp > Vgt

A. α = 90°
B. α > 90°
C. α < 90°
D. α = 0°
Answer» D. ‚âà√≠¬¨¬± = 0¬¨¬®‚Äö√†√ª
Discussion
2.

In case of a R firing with R2 as the variable resistance, Vgp (peak of gate voltage) and Vgt (gate triggering voltage) the value of R2 is so adjusted such that

A. V<sub>gp</sub> = V<sub>gt</sub>
B. V<sub>gp</sub> > V<sub>gt</sub>
C. V<sub>gp</sub> < V<sub>gt</sub>
D. V<sub>gp</sub> = V<sub>gt</sub> = 0
Answer» B. V<sub>gp</sub> > V<sub>gt</sub>
Discussion
3.

In case of an RC half wave triggering circuit, the firing angle can be ideally varied between

A. 0 to 180
B. 0 to 90
C. 0 to 120
D. 0 to 360
Answer» B. 0 to 90
Discussion
4.

The diode in the R firing circuit

A. ensures that the gate voltage is a half wave DC pulse
B. ensures that the gate voltage is a full wave DC pulse
C. ensures that the gate voltage is a half wave AC pulse
D. ensures that the gate voltage is a full wave AC pulse
Answer» C. ensures that the gate voltage is a half wave AC pulse
Discussion
5.

For a R firing circuit, the maximum value of source voltage is 100 V. Find the resistance to be inserted to limit the gate current to 2 A.

A. 5 Ω
B. 50 Ω
C. 500 Ω
D. 0.5 Ω
Answer» C. 500 ‚Äö√Ñ√∂‚àö√´¬¨‚àÇ
Discussion
6.

In a resistance firing circuit the firing angle

A. cannot be greater than 120°
B. cannot be greater than 90°
C. cannot be greater than 180°
D. cannot be greater than 160°
Answer» C. cannot be greater than 180¬¨¬®‚Äö√†√ª
Discussion