Single Phase SemiConverters Objective Questions
Power Electronics Objective Questions & Answers
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Name the circuit shown below.
Correct!
Wrong!

In the below given circuit, the average value of output voltage is 191 V. Find the value of the average current through the given load if E = 100 V and R = 5 Ω. Assume that the load current is continuous.
Correct!
Wrong!

Find the average output dc voltage of a singlephase semiconverter with Vs=230 V and firing angle of 30°. The converter is operating under continuous conduction.
Correct!
Wrong!

All the modern ACDC converters are using GTOs instead of SCRs because
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Wrong!

A singlephase semiconverter is operated from a 240 V, 60 Hz, AC source. It is fired at an angle of 45°. Find the value of average output voltage
Correct!
Wrong!

A singlephase semiconverter is operated from a 230 V, 60 Hz, AC source. A DMM connected at its output terminals read 219.3 V. Find the value of FF (form factor).
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Wrong!

A singlephase semiconverter is having continuous conduction, as such each thyristor will conduct for an angle of
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Wrong!

Consider the following statement:
The overlap angle of a phase controlled converter will increase ___________
i) if the firing angle is increased
ii) if the supply frequency is increased
ii) if the supply voltage magnitude is lowered
Of these statements
The overlap angle of a phase controlled converter will increase ___________
i) if the firing angle is increased
ii) if the supply frequency is increased
ii) if the supply voltage magnitude is lowered
Of these statements
Correct!
Wrong!

Consider the following statements regarding phase controlled converters:
i) They do not provide smooth variation of output voltage.
ii) They inject harmonics into the power system.
iii) They draw nonunity power factor current for finite firing angles.
Which of the above statements are correct?
i) They do not provide smooth variation of output voltage.
ii) They inject harmonics into the power system.
iii) They draw nonunity power factor current for finite firing angles.
Which of the above statements are correct?
Correct!
Wrong!

In the below given circuit, the average value of output voltage is 191 V. Find the value of the power delivered to the voltage source E. Take E = 100 V and R = 5 Ω. Assume that the load current is continuous.
Correct!
Wrong!
