Electric Potential at a point is the work done per unit charge in bringing a charge from infinity to that point. Electric potential is the scalar quantity and its unit is volt (V). Mathematically, it can also be represented as the ratio of...
An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionised gas (plasma)....
A magnetic field is produced in the surrounding of any current carrying conductor. The strength of magnetic field is called one tesla, if a charge of one coulomb, when moving with a velocity of 1 ms-1 along a direction perpendicular to the...
When there is a changing magnetic field around a closed circuit, as shown in the animation, an electric current is induced in the circuit. This phenomenon is known as Electromagnetic Induction. The greater the rate of change in magnetic field,...
In physics, electromagnetic radiation (EM radiation or EMR) refers to the waves (or their quanta, photons) of the electromagnetic field, propagating (radiating) through space-time, carrying electromagnetic radiant energy. It includes radio waves,...
Optics is the branch of physics which involves the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it. Optics usually describes the behaviour of visible,...
In physics, radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium. This includes: electromagnetic radiation, such as radio waves, microwaves, visible light, x-rays, and...
(i) Energy bands in solids; energy band diagrams for distinction between conductors, insulators and semi-conductors - intrinsic and extrinsic; electrons and holes in semiconductors.
(ii) Junction diode; depletion region; forward and reverse...
In telecommunication, a communications system is a collection of individual communications networks, transmission systems, relay stations, tributary stations, and data terminal equipment (DTE) usually capable of interconnection and interoperation...
Change of voltage and current with time, phase; peak and rms values of voltage and current; their relation in sinusoidal case.Variation of voltage and current in a.c. circuits consisting of only a resistor, only an inductor and only a capacitor...
(i) Nuclear fission; chain reaction; principle of operation of a nuclear reactor.
(ii) Nuclear fusion; thermonuclear fusion as the source of the sun's energy.
