Which of the following is correct for inverters?
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ECE · all questionsPower Electronics
Power Electronics
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Which one of the following statements regarding the two transistor model of the p-n-p-n four layer device is correct?
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An SCR combines the features of . . . . . . . .
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The duty cycle of a pulse of width 2 microsecond and repetition frequency 4 kHz is
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Which semiconductor device behaves like two SCRs?
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The number of terminals present in IGBT is
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From circuit design simplicity and economy point of view, one of the following configurations for a converter is the best. Which is that?
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Which of the following device used for high frequency applications?
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An SCR can be switched from a non-conducting state to a conducting state by applying
1. A voltage with high
2. Voltage greater than forward break over voltage
3. Negative gate current with positive anode voltage
4. Positive gate current with positive anode voltage
Which of the following is correct?
1. A voltage with high
2. Voltage greater than forward break over voltage
3. Negative gate current with positive anode voltage
4. Positive gate current with positive anode voltage
Which of the following is correct?
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A TRIAC is similar to
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How many SCR are to be connected in series with 800 V rating to be used for 3 kV circuit using derating factor of 15%?
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A single phase voltage source square wave inverter feeds pure inductive load. The waveform of the load current will be
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A circuit uses SCR of 800 V rating after which the derating is 25% then the SCR in series
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In a thyristor DC chopper, which type of commutation results in best performance?
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An ideal thyristor is driving an R-L load of impedance Z. Input AC voltage Vs = Vmsinωmt. If thyristor if fired at an input phase angle of 90°. What will be the output voltage and output current across R-L load as the instant of firing?
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A thyristor equivalent of a thyratron tube is a
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Buck-Boost converter is one of the,
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A single phase one pulse controlled circuit has a resistance and counter emf load 200sin(512t) as the source voltage for a load counter emf of 100 V, the range of firing angle control will be:
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In UJT, maximum value of charging resistance is associated with
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Q100
Open questionMatch List-I with List-II and select the correct answer using the options given below:
| List-I (Device) | List-II (Associated Term) |
| a. Diode | 1. Pinch off voltage |
| b. SCR | 2. Holding current |
| c. BJT | 3. Forward resistance |
| d. FET | 4. Active region |
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