Q.1
A single phase full bridge inverter has RLC load with R = 4 Ω, Xl =Ω and Xc = 20.Ω. The dc input voltage isV. Find the value of fundamental load power.
  • a) 1633 W
  • b) 1603 W
  • c) 1576 W
  • d) none of the mentioned
Q.2
A single phase full bridge inverter has RLC load with R = 4 Ω, L =mH and C =μF. The dc input voltage isV and the output frequency isHz. Find the angle by which the third harmonic current will lead/lag the third harmonic output voltage.
  • a) 67.25°
  • b) 96.4°
  • c) 49.87°
  • d) 81.3°
Q.3
A single phase half bridge inverter has RLC load. The dc input voltage (Vs/=V and the output frequency isHz. The expression for the load voltage up to the fifth harmonic will be given by
  • a) 146 sin 314t + 48.81 sin 314t + 58.57 sin 318t + 28.31 sin 318t + 3.686 sin 318t
  • b) 146 sin 314t + 48.81 sin (3 x 314t) + 29.28 sin (5 x 318t)
  • c) 146 sin 314t + 48.81 sin (2 x 314t) + 58.57 sin (3 x 318t)
  • d) none of the mentioned
Q.4
Let Vs be the amplitude of the output voltage and P be the output power for a single-phase half bridge inverter. Then the corresponding values for a full bridge inverter would be
  • a) 2Vs, 4P
  • b) 2Vs, 2P
  • c) Vs, P
  • d) 2Vs, P
Q.5
In VSI (voltage source inverters)
  • a) both voltage and current depend on the load impedance
  • b) only voltage depends on the load impedance
  • c) only current depends on the load impedance
  • d) none of the mentioned
Q.6
The harmonic factor of nth harmonic is given by
  • a) Vn
  • b) V1/Vn
  • c) Vn/V1
  • d) None of the mentioned
Q.7
____________ is the measure of the contribution of any individual harmonic to the inverter output voltage.
  • a) THD
  • b) Distortion Factor
  • c) Harmonic Factor
  • d) TUF
Q.8
The Total Harmonic Distortion (THD) is the ratio of
  • a) rms value of all the harmonic components to the rms value of the fundamental component
  • b) average value of all the harmonic components to the rms value of the fundamental component
  • c) rms value of all the third harmonic component to the rms value of the fundamental component
  • d) rms value of all the fundamental component to the rms value of all the harmonic components
Q.9
The HF (Harmonic factor of nth harmonic) is the ratio of
  • a) an average and a rms value
  • b) a rms and an average value
  • c) two volt-ampere values
  • d) two rms values
Q.10
The total harmonic distortion (THD) is the measure of
  • a) input vs output power factor
  • b) temperature sensitivity
  • c) waveform distortion
  • d) contribution of each harmonic to the total output
0 h : 0 m : 1 s