Electromagnetic Induction — Physics STD 12 Science — Question

How does an increase in doping concentration affect the width of depletion layer of a p-n junction diode?

For most of the surfaces used in daily life, the friction coefficient is less than 1. Is it always necessary that the friction coefficient is less than 1?

A circular loop of radius 4.0cm is placed in a horizontal plane and carries an electric current of 5.0A in the clockwise direction as seen from above. Find the magnetic field:

1. At a point 3.0cm above the centre of the loop.
2. At a point 3.0cm below the centre of the loop.

A metallic metre stick moves with a velocity of 2m/s^-1 in a direction perpendicular to its length and perpendicular to a uniform magnetic field of magnitude 0.2 T. Find the emf induced between the ends of the stick.

Answer the following questions:
The earth’s core is known to contain iron. Yet geologists do not regard this as a source of the earth’s magnetism. Why?

Write expression in vector form for produced magnetic field due to small part of a current carrying conductor in Biot-Savart law.

How is the radius of a nucleus related to its mass number?###Write the relation between radius R and mass number A of a nucleus.

Consider a book lying on a table. The weight of the book and the normal force by the table on the book are equal in magnitude and opposite in direction. Is this an example of Newton's third law?