List of top Physics Questions on Semiconductors

Zener diode is used for
The reverse saturation current of p--n diode
In the circuit shown above, an input of 1V is fed into the inverting input of an ideal Op-amp A. The output signal \(V_{out}\) will be
When a solid with a band gap has a donor level just below its empty energy band, the solid is
A p--n junction has acceptor impurity concentration of \(10^{17}\,cm^{-3}\) in the p-side and donor impurity concentration of \(10^{16}\,cm^{-3}\) in the n-side. What is the contact potential at the junction (\(T=\) thermal energy, intrinsic semiconductor concentration \(n_i = 1.4\times 10^{10}\,cm^{-3}\)) ?
A Zener diode has a contact potential of 1V in the absence of biasing. It undergoes Zener breakdown for an electric field of \(10^6\) V/m at the depletion region of p--n junction. If the width of the depletion region is \(2.5\,\mu m\), what should be the reverse biased potential for the Zener breakdown to occur?
A conductor and a semi-conductor are connected in parallel as shown in the figure. At a certain voltage both ammeters register the same current. If the voltage of the DC source is increased then
Identify the logic gate from the following TRUTH table
In Boolean algebra, \( A \cdot B \) is equal to
Two identical P-N junctions are connected in series in three different ways as shown below to a battery. The potential drop across the P-N junctions are equal in
The temperature coefficient of a zener mechanism is
When the conductivity of a semiconductor is due only to the breaking up of the covalent bonds, the semiconductor is known as:
In a P-type semiconductor, the acceptor impurity is:
When Boron is added as impurity to silicon, semiconductor becomes: