Question 1 : In inverters, to make the supply voltage constant
1. an inductor is placed in series with the load
2. capacitor is connected in parallel to the load side
3. capacitor is connected in parallel to the supply side
4. none of the mentioned
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Question 2 : A single phase half bridge inverter has load R = 2 Ω and a dc voltage source Vs/2 = 115 V. Find the rms value of the fundamental load current.
1. 10.25 A
2. 51.7 A
3. 86 A
4. 24.8 A
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Question 3 : A single phase full bridge inverter has load R = 2 Ω, and dc voltage source Vs = 230 V. Find the rms value of the fundamental load current.
1. 96 A
2. 0 A
3. 103 A
4. none of the mentioned
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Question 4 : In single-phase modulation of PWM inverters, the pulse width is 120°. For an input voltage of 220 V dc, the rms value of output voltage is
1. 185 V
2. 254 V
3. 127 V
4. 179 V
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Question 5 : A single-phase half bridge inverter is connected to a 230 V dc source which is feeding a R load of 10 Ω. Determine the average current through each SCR inverter switch.
1. 11.5 A
2. 5.75 A
3. 23 A
4. none of the mentioned
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Question 6 : In sinusoidal pulse width modulation, the comparator output is high when the
1. triangular wave has magnitude higher than the sinusoidal wave
2. sinusoidal wave has magnitude higher than the triangular wave
3. triangular wave has magnitude equal to the sinusoidal wave
4. none of the mentioned
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Question 7 : In current source inverters (CSIs), the output voltage's
1. amplitude depends upon the load impedance
2. waveform depends upon the load impedance
3. amplitude as well as the nature of the waveform depends on the load
4. both amplitude and waveform are independent of the load impedance
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Question 8 : In ___________ type of modulation method, the pulse width is not equal for all the pulses.
1. multiple pulse width modulation
2. single pulse width modulation
3. sinusoidal pulse width modulation
4. none of the mentioned
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Question 9 : In current source inverters (CSIs)
1. the amplitude of the output current is independent of the load
2. the amplitude of the output current dependents on the load
3. the amplitude of the output voltage is independent of the load
4. none of the mentioned
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Question 10 : The output voltage from a single phase full wave bridge inverter varies from
1. Vs to -Vs
2. Vs to zero
3. Vs/2 to zero
4. -Vs/2 to Vs/2
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