Semiconductor Electronics: Materials, Devices and Simple Circuits — Physics STD 12 Science — Question

Write the reason for this event. Most of the electrons passes through the gold foil without deflected.

What do you find, if the total energy of electron is zero?

A car travels at a speed of 60km/hr due north and the other at a speed of 60km/hr due east. Are the velocities equal? If no, which one is greater? If you find any of the questions irrelevant, explain.

Which property of light is confirmed by the pattern of polarization?

Write names of those radiations of electromagnetic radiations which are :(i) used in satellite communication (ii) used to study crystal structure (iii) produced as a result of decay of radioactive nucleus (iv) wavelength in between 350 nm and 770 nm (v) absorbed by the ozone layer (vi) produce extensive heating effect.

If ni is density of intrinsic charge carriers; nh and ne are densities of hole and electrons in extrinsic semiconductor, what is the relation among them?

A charge 'q' is moved from a point A above a dipole of dipole moment 'p' to a point B below the dipole in equatorial plane without acceleration. Find the work done in the process.

If the area of one plate of a parallel plate capacitor is halved, will the device work as a capacitor?

The value of electric flux through a closed surface is zero. What does this mean?

For what purpose are capacitors used in computers?