Semiconductor Electronic: Material, Devices And Simple Circuits — Physics STD 12 Science — Question

Verify that the units weber and volt-second are the same.

Explain mutual induction using Faraday's two coil experiment. Obtain expression

Discuss induced emf produced in a conducting rod during its motion in direction perpendicular to uniform magnetic field with reference to Lorentz force and obtain its expression.

 An alternating voltage of frequency f is applied across a series LCR circuit. Let f_r be the resonance frequency for the circuit. Will the current in the circuit lag, lead or remain in phase with the applied voltage when (i) f > f _r, (ii) f < f_r? Explain your answer in each case. 

A monkey is sitting on a tree limb. The limb exerts a normal force of 48N and a frictional force of 20N. Find the magnitude of the total force exerted by the limb on the monkey.

Due to diffraction effects, the beam of ray gets focused as a spot of radius of approximately what value?

Two charges 2 µC and –2 µC are placed at points A and B 6 cm apart.

1. Identify an equipotential surface of the system.
2. What is the direction of the electric field at every point on this surface?

Provide the classification of semi-conductors with example.

Two protons and two electrons are hanging freely at equal distances. Compare the repulsion force between proton and electron.

Define atomic mass unit (amu) and write its equivalent energy.