Class XII Physics Semiconductor Electronics Quiz 5
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Calculate the mobility of electron in an n-type semiconductor. if the density of conduction electron and holes are and respectively. The resistivity of semiconductor and mobility of holes is and, respectively.
An ideal diode and a resistor are connected as shown in the diagram below. A sinusoidal voltage is applied as the input . Which of the four waveforms shown below describes the output ? (T is the time period of the input waveform, and R is a series resistance.)
A LED is constructed using a p-n junction whose gap energy is 2 eV. What is the color of light emitted by the LED? (Given, approximate wavelength range for red, yellow, green, and blue are 620-750 nm, 570-590 nm, 570-495 nm, and 495-450 nm, respectively.)
An amplifier with 9.5% voltage gain, voltage gain without feedback is 10. The voltage gain with negative feedback is
If Boolean function is represented as . How many minimum number of gates are required to represent this Boolean function if not all gates are same.
What is the output of following circuit :
An npn transistor is in saturation mode, if the common emitter current gain is βand the base current is IB, then
In the figure given below an npn transistor is connected, with resistances and batteries. If the resistance connected with the base RB is increased, then