Virtual Labs

Fig. 1. Circuit diagram of single-phase bridge inverter.

1. What is the definition of modulation index (MI) where ‘A_r’ is reference signal amplitude and ‘A_c’ is carrier signal amplitude, then modulation index (MI) is

a: A_r/A_c Explanation

Explanation

b: A_c/A_r Explanation

Explanation

c: (1-A_c)/A_r Explanation

Explanation

d: (1-A_r)/A_c Explanation

Explanation

2. What is output voltage when switch “S₁” and “S₃” are “ON”

a: 0 Explanation

Explanation

b: -V_in Explanation

Explanation

c: V_in Explanation

Explanation

d: V_in/2 Explanation

Explanation

3. An inverter converts

a: DC -to- DC Explanation

Explanation

b: DC -to- AC Explanation

Explanation

c: AC -to- AC Explanation

Explanation

d: AC -to- DC Explanation

Explanation

4. In voltage source inverters (VSI)

a: both voltage and current depend on the load impedance Explanation

Explanation

b: only voltage depends on the load impedance Explanation

Explanation

c: only current depends on the load impedance Explanation

Explanation

d: neither voltage nor current depends Explanation

Explanation

5. The Total Harmonic Distortion (THD) is

Explanation

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