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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.1Medium

Which parameter is most important for selecting a heat sink for a power transistor?

Q.2Medium

In a MOSFET, what does the threshold voltage (Vth) represent?

Q.3Medium

A photodiode is primarily used for:

Q.4Medium

In a JFET, the pinch-off voltage (Vp) is the gate-source voltage at which:

Q.5Medium

What is the maximum collector-emitter voltage rating (Vceo) used for?

Q.6Medium

A varactor diode is used primarily for:

Q.7Medium

In a triode vacuum tube, which electrode controls the flow of electrons?

Q.8Medium

In a p-n junction diode, the depletion region width depends on which of the following factors?

Q.9Medium

A PIN diode is primarily used in high-frequency applications because:

Q.10Medium

In a BJT operating in the active region, which relationship holds true?

Q.11Medium

In a CMOS inverter, the power dissipation is primarily due to:

Q.12Medium

The gain-bandwidth product (GBP) of a BJT is approximately equal to:

Q.13Medium

Channel length modulation in MOSFETs causes:

Q.14Medium

In a photodiode, the photocurrent is proportional to:

Q.15Medium

In a thyristor (SCR), the holding current (IH) is important because:

Q.16Medium

A MOSFET operating in triode (linear) region exhibits:

Q.17Medium

Which statement correctly describes the Early effect in BJTs?

Q.18Medium

In a Zener diode regulation circuit, increasing load current causes:

Q.19Medium

A Schottky diode compared to a pn-junction diode has:

Q.20Medium

The breakdown mechanism in a Zener diode at low doping concentrations is primarily: