The study of the electrical characteristics of a filament lamp provides insightful information about its behavior under different conditions, particularly how its resistance changes with temperature. To understand this phenomenon comprehensively, it’s essential to delve into the relationship between voltage (V), current (I), and resistance, as well as the underlying physics governing the behavior of the filament when it is …
Semiconductor Diodes A semiconductor diode is a two-terminal electronic component made from semiconductor material, typically silicon or germanium, doped with impurities to create a p-n junction. This junction has unique electrical properties, allowing current to flow more easily in one direction than in the opposite direction, which is the fundamental characteristic of diodes. Forward Bias and Reverse Bias Breakdown Region …
Electrical Conductivity in Metals Metals are known for their ability to conduct electricity. This electrical conductivity is due to the presence of free electrons within the metallic lattice. In a metal, atoms are arranged in a closely packed lattice structure, and the outermost electrons of these atoms are not bound to any specific atom. Instead, they are free to move …
Semiconductors Generally, for semi-conductors, resistance decreases with temperature. Electrolyte Gases
Electrical Conductors For metals, resistance increases with temperature. Electrical Insulators
Electric Current: Overview Electric current is the movement of electric charges and is fundamental to understanding current electricity. This phenomenon is distinct from static electricity, also known as electrostatics, where charges remain stationary. Definition Electric current, denoted as $I$, is the rate of flow of charges $Q$ through a particular cross sectional area with respect to time.. It is measured …
Electric potential energy of a charge in an electric field is defined as the work done by an external force in bringing the charge from infinity to that point a distance r away. $U = \frac{Q_{1} Q_{2}}{4 \pi \epsilon_{o} r}$ , where The electron volt is defined as energy that an electron (or proton) gains (or loses) when it is …