Semiconductor Electronics (Class 12)
P-N junction, diodes, rectifiers, BJT, logic gates, Zener diode.
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Take a full mock →Q1 · Semiconductor Electronics (Class 12) · EASY
A P-N junction diode has a barrier potential of 0.7 V at room temperature. When forward biased with 5 V through a resistor of 4.3 kΩ, what is the current through the diode?
Q2 · Semiconductor Electronics (Class 12) · MEDIUM
A half-wave rectifier uses a diode with forward resistance 25 Ω and a load resistance of 500 Ω. If the peak voltage of the AC input is 20 V, what is the peak current through the load?
Q3 · Semiconductor Electronics (Class 12) · HARD
A Zener diode with breakdown voltage 6 V is used in a voltage regulator circuit. The input voltage is 12 V and a series resistance of 1 kΩ is connected. If the load resistance varies such that load current changes from 2 mA to 8 mA, what is the change in Zener current?
Q4 · Semiconductor Electronics (Class 12) · EASY
In an intrinsic semiconductor at room temperature, if the number density of electrons is 1.5 × 10¹⁶ per m³, what is the number density of holes?
Q5 · Semiconductor Electronics (Class 12) · MEDIUM
For a transistor amplifier in common emitter configuration, if the current gain β is 100 and the base current changes by 5 μA, what is the change in collector current?