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Electronics (ECE) - MCQ Practice Questions

Practice free Electronics (ECE) multiple-choice questions with detailed answers and explanations. Perfect for competitive exam preparation.

400 questions | 100% Free

Q.1Hard

A tunnel diode exhibits negative resistance in a specific voltage range due to:

Q.2Hard

For a BJT in saturation, the relationship between base current and collector current is:

Q.3Hard

Which of the following statements about CMOS logic is correct?

Q.4Hard

In a power MOSFET, the on-resistance (RDS_on) is primarily determined by:

Q.5Hard

A Schottky diode offers advantages over PN junction diodes primarily because of:

Q.6Hard

What is the significance of Early voltage (VA) in a BJT?

Q.7Hard

In integrated circuit design, what does the term 'aspect ratio' refer to in MOSFETs?

Q.8Hard

The transconductance (gm) of a MOSFET in saturation region is given by:

Q.9Hard

The punch-through effect in a BJT occurs when:

Q.10Hard

The body effect in MOSFETs causes which of the following?

Q.11Hard

In a Gunn diode, negative resistance occurs due to:

Q.12Hard

The Miller effect in a common-emitter BJT amplifier causes:

Q.13Hard

The avalanche breakdown voltage (BV) in a reverse-biased junction approximately follows:

Q.14Hard

When a BJT is used as a switch in saturated condition, the overdrive factor is defined as:

Q.15Hard

A JFET in pinch-off condition means:

Q.16Hard

In practical MOSFET applications for RF circuits, which parasitic effect limits frequency response most?

Q.17Hard

The noise figure of a BJT amplifier at low frequencies is primarily determined by:

Q.18Hard

In a MOSFET differential amplifier, the common-mode gain is reduced by using:

Q.19Hard

The avalanche multiplication factor M in reverse-biased junction is expressed as:

Q.20Hard

The transconductance (g_m) of a MOSFET in saturation is given by: