1. . A single phase full bridge inverter has a dc voltage source Vs = 230 V. Find the rms value of the fundamental component of output voltage.
(A) 90 V
(B) 207 V
(C) 350 V
(D) 196 V
2. . In a half wave circuit, forced commutation is essential when the
(A) none of the mentioned
(B) load is resistive
(C) source voltage is below 150 V
(D) load is inductive
3. . A three-phase bridge inverter requires minimum of _____________ switching devices.
(A) 6
(B) 4
(C) 3
(D) 8
4. . In the three-phase bridge inverter, each step consists of
(A) 60°
(B) 30°
(C) 90°
(D) will depend on the value of the firing angle
5. . Line-commutated inverters have
(A) DC on the supply side and AC on the load side
(B) AC on both supply and load side
(C) DC on both supply and load side
(D) AC on the supply side and DC on the load side
6. . Single phase half bridge inverters requires
(A) two wire ac supply
(B) two wire dc supply
(C) three wire ac supply
(D) three wire dc supply
7. . The output of a single-phase half bridge inverter on R load is ideally
(A) a sine wave
(B) square wave
(C) a triangular wave
(D) constant dc
8. . The output current wave of a single-phase full bridge inverter on RL load is
(A) a sine wave
(B) a square wave
(C) a triangular wave
(D) constant dc
9. . Single-phase full bridge inverters requires
(A) 4 SCRs and 2 diodes
(B) 4 SCRs and 4 diodes
(C) 2 SCRs and 4 diodes
(D) 2 SCRs and 2 diodes
10. . In a half wave circuit, forced commutation is essential when the
(A) none of the mentioned
(B) load is resistive
(C) source voltage is below 150 V
(D) load is inductive