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Question 1

A 1- Φ diode Bridge rectifier is required to supply a dc output voltage of 120 V to a load  resistance R = 6Ω. Determine the transformer rating required for this configuration in KVA?

Question 2

A single-phase full bridge diode rectifier is supplied form 230 V, 50 Hz. The load have R = 10 Ω and a large inductance so as to render the load current constant. Then determine the rms value of diode current?

Question 3

A 120V, 50Hz ac voltage is applied to the primary of 5:1 step up transformer whose secondary is centre tapped allowing a load of 1KΩ to be connected for a full wave rectification using two diodes. The lowest value of ripple frequency in Hz ?

Question 4

What is the purpose of using the free-wheeling diode in power converters?

Question 5

A dual ac-dc converter operates in which of the following quadrant

Question 6

Determine the ripple factor for a full wave bridge rectifier, assuming ideal diodes and purely resistive load.

Question 7

Consider the rectifier circuit shown below. The supply have 230V, 50Hz, and the load resistance having the value of R = 10Ω than find the RMS value of current flows through diode D1?

Question 8

In a single-phase full wave diode bridge rectifier the diodes have a reverse recovery time of 40 μs. For an AC input voltage of 230 V, Determine the reduction in average output voltage due to reverse recovery time for a supply frequency of 2.5 KHz?

Question 9

In the single-phase diode bridge rectifier shown in figure, the load resistor is R = 50 Ω. The source voltage is V = 200 sin(ωt), where ω = 2π × 50 rad/sec. The power dissipated in the load resistor R is

Question 10

Analysis of voltage waveform of a single-phase bridge converter shows that it contains x % of 6th harmonic. The 6th harmonic content of the voltage harmonic content of the voltage waveform of a 3-phase bridge converter would be
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Jun 23ESE & GATE EE