Test: SOA


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10 Questions MCQ Test Power Electronics | Test: SOA

Test: SOA for Electrical Engineering (EE) 2023 is part of Power Electronics preparation. The Test: SOA questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: SOA MCQs are made for Electrical Engineering (EE) 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: SOA below.
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Test: SOA - Question 1

 For a transistor, the safe operating area (SOA) is a plot of

Detailed Solution for Test: SOA - Question 1

For reliable operation the collector current & voltage must remain within the SOA curves.

Test: SOA - Question 2

The forward safe operating area (FSOA) pertains to the operation when

Detailed Solution for Test: SOA - Question 2

The FSOA is for forward biased operations. The FSOA is plotted for AC as well as DC for different duty cycles. Hence, option (b) is the most appropriate choice.

Test: SOA - Question 3

The SOAs are plotted always on a _________ scale

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The scale is always logarithmic, irrespective of the type of device.

Test: SOA - Question 4

 As the FSOA increases, the pulse width

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On reduced pulse width values, the devices can operated on higher voltages & currents.

Test: SOA - Question 5

The SOAs provided by the manufacturers are for

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The manufacturer specifies the SOAs only for single pulse DC operation & a particular temperature (usually 20Degree Centigrade Scale). For actual operations, The SOA’s have to be modified using the thermal impedance charts.

Test: SOA - Question 6

A device is operating at Ic = 4A & Vce = 50V. For the device to operate at Ic = 20A (Without damaging),

Detailed Solution for Test: SOA - Question 6

For safe operation, the values should be within the limits. P = V.I – with increase in one of the values, another value should decrease.

Test: SOA - Question 7

For a BJT, find the maximum power dissipation when the device is safely operated at Vce = 90V and Ic = 0.5A

Detailed Solution for Test: SOA - Question 7

P=90*0.5=45Watts.

Test: SOA - Question 8

The SOA for a MOSFET is plotted for

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It is a plot of drain current vs drain to source voltage.

Test: SOA - Question 9

The SOA for an IGBT is plotted for

Detailed Solution for Test: SOA - Question 9

It is a plot of collector current vs collector to emitter voltage.

Test: SOA - Question 10

For MOSFET’s SOA, as the pulse width goes on increasing, the maximum voltage rating ____ & current rating ____

Detailed Solution for Test: SOA - Question 10

Refer MOSFET’s SOA.

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