Semiconductors, p-n junction diode, rectifiers, special-purpose diodes, junction transistor basics, logic gates.
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Q1 · Electronic Devices · EASY
A p-n junction diode is formed by joining p-type and n-type semiconductors. Under forward bias condition (p-side connected to positive terminal), what happens to the depletion region and the current through the diode?
Q2 · Electronic Devices · MEDIUM
A full-wave rectifier circuit converts AC input voltage into DC output voltage. If the input AC voltage has a frequency of 50 Hz, what is the frequency of the ripple in the output DC voltage of a full-wave rectifier?
Q3 · Electronic Devices · MEDIUM
In a common-emitter transistor amplifier configuration, a small change in base current (ΔI_B = 20 microampere) produces a change in collector current (ΔI_C = 2 milliampere). What is the current gain (β) of this transistor?
Q4 · Electronic Devices · HARD
A Zener diode has a breakdown voltage of 6 V. It is connected in series with a resistance of 500 ohm across a 12 V battery. If the Zener diode is operating in the breakdown region and maintaining constant voltage across it, what is the current flowing through the resistance? Assume the Zener diode is reverse biased.
Q5 · Electronic Devices · MEDIUM
In a p-type semiconductor, which of the following statements is correct?