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
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