Electromagnetic Waves Class 12 Notes Chapter 8 1. Displacement Current The current which comes into play m the region in which the electric field and the electric flux is changing with time. It is given by 2. Need for Displacement Current Ampere’s circuital law for conduction current during charging of a capacitor was found inconsistent. Therefore, Maxwell modified Ampere’s … [Read more...]
Nuclei Class 12 Notes Chapter 13
Nuclei Class 12 Notes Chapter 13 1. In every atom, the positive charge and mass are densely concentrated at the centre of the atom forming its nucleus. More than 99.9% mass of the atom is concentrated in the nucleus. 2. Atomic Mass Unit (amu) The unit to express atomic masses is called atomic mass unit. Atomic mass unit is defined as 1/12 th of the mass of carbon atom … [Read more...]
Dual Nature of Radiation and Matter Class 12 Notes Chapter 11
Dual Nature of Radiation and Matter Class 12 Notes Chapter 11 1. Photoelectric Effect The phenomenon of emission of photoelectron from the surface of metal, when a light beam of suitable frequency is incident on it, is called photoelectric effect. The emitted electrons are called photoelectrons and the current so produced is called photoelectric current. Hertz’ Observation … [Read more...]
Magnetism And Matter Class 12 Notes Chapter 5
Magnetism And Matter Class 12 Notes Chapter 5 1. The magnetic dipole moment of a magnetic dipole is given by M = m × 2I where, m is pole strength and 2I is dipole length directed from S to N. The SI unit of magnetic dipole moment is A-m2 or J/T. It is a vector quantity and its direction is from South pole to North pole. 2. Coulomb’s Law in Magnetism Magnitude of force … [Read more...]
Alternating Current Class 12 Notes Chapter 7
Alternating Current Class 12 Notes Chapter 7 1. Alternating Current (AC) It is the current which varies in both magnitude as well as direction alternatively and periodically. I = I0 sin ωt or I = I0 cosωt where, I0 = peak value or maximum value of AC. 2. Effective Value or rms Value of AC It is defined as the value of AC over a complete cycle which would generate same amount … [Read more...]