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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.21Hard

The thermal runaway condition in a BJT occurs because:

Q.22Hard

The charge storage time in a BJT switch is primarily due to:

Q.23Hard

In a PIN diode used as an RF switch, the operating principle is based on:

Q.24Hard

The noise figure of an amplifier is defined as:

Q.25Hard

The substrate effect in a MOSFET causes:

Q.26Hard

The frequency response of a BJT amplifier is limited at high frequencies primarily by:

Q.27Hard

A tunnel diode exhibits negative differential resistance. At what operating point is the dynamic resistance most negative?

Q.28Hard

A CMOS logic gate has static power dissipation. Which phenomenon is primarily responsible for this in 2024 technology nodes?

Q.29Hard

A MESFET (Metal-Semiconductor FET) differs from a JFET primarily in which aspect?

Q.30Hard

In a heterostructure bipolar transistor (HBT), the wide bandgap material in the emitter provides which advantage?