Electronics (ECE) - MCQ Practice Questions

A clamping diode in logic circuits is used to:

A Zener diode is operating in reverse breakdown with a current of 50 mA. If the Zener resistance is 5 Ω and Zener voltage is 12 V, what is the terminal voltage?

In a BJT, if the base-emitter junction is forward biased and the base-collector junction is also forward biased, the transistor is operating in which region?

In a photodiode, the photocurrent is primarily determined by which parameter?

In a JFET, as the reverse bias voltage on the gate-source junction increases, what happens to the channel width?

In a p-channel MOSFET, if VGS = -8 V and VT = -2 V, what is the gate-source overdrive voltage?

A power MOSFET has RDS(on) = 0.5 Ω and carries 20 A. What is the approximate conduction power loss?

Which semiconductor material has the highest electron mobility among common choices?

In a silicon p-n junction diode at room temperature (T = 300K), the thermal voltage (VT) is approximately: