List of top Physics Questions on Semiconductor electronics: materials, devices and simple circuits

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The substance which has an energy band gap equal to the energy of the spectral line corresponding to the shortest wavelength of Paschen series of the hydrogen spectrum is:

The resultant logic gate of the combination of logic gates given in the circuit is:

Two OR gates and one AND gate are connected as shown. Find correct truth table output Y.

An electron in n-region enters p-region with speeds $5\times10^5$ m/s and $3\times10^5$ m/s before and after barrier. Find barrier potential.

A pure silicon with $6 \times 10^{28}$ atoms is doped with arsenic of 1 ppm concentration. If the intrinsic carrier concentration is $1.2 \times 10^{16} m^{-3}$, then the number of holes in the doped silicon is}

The ratio of energies of forbidden bands of silicon and germanium is nearly

Which of the following semiconductors is electrically negative?

A wafer of pure germanium crystal has two parts X and Y. The end X is obtained by doping with arsenic and Y with indium. It is connected to a battery as shown in the figure. Which of the following statements is correct?

In which of the following figures, diode is reverse biased?

An n-type and p-type semiconductor can be obtained by respectively doping pure silicon with

In a forward biased semiconductor potential changes from 0.9V to 0.6 V. Find current if resistance is $1\Omega$

For the logic gate shown in the diagram, find the output \(Y\) for the given inputs \(A\) and \(B\).

The correct truth table for the given input data of the following logic gate is:

Out of the following impurities, which impurity is not a trivalent?

If the output frequency of a full-wave rectifier is 100 Hz, then input frequency will be ______.

When a forward bias is applied to a p-n junction. It ______.

For the given statements below, mark the correct option. Statement-I: Work done by a conservative force \( f \), from \( r_1 \) to \( r_2 \) is given by: \[ W = \int_{r_1}^{r_2} f \, dr. \] Statement-II: Work done by conservative force is path dependent.

A voltage regulating circuit consisting of a Zener diode having breakdown voltage of $10\,\text{V}$ and maximum power dissipation of $0.4\,\text{W}$ is operated at $15\,\text{V}$. The approximate value of protective resistance in this circuit is ___ $\Omega$.

In hydrogen atom spectrum, (R → Rydberg's constant)
A. the maximum wavelength of the radiation of Lyman series is 4/3R
B. the Balmer series lies in the visible region of the spectrum
C. the minimum wavelength of the radiation of Paschen series is 9/R
D. the minimum wavelength of Lyman series is 5/4R
Choose the correct answer from the options given below :

Consider the following reaction.

The correct structure of \( Y \) is