## Varistor

A varistor is a semiconductor resistor with a symmetric non-linear volt-ampere characteristic. The name is derived from the words “variable resistor” – a resistor that changes. It has the property of sharply decreasing its resistance when the applied voltage exceeds a certain threshold value. With further increase in voltage, the resistance decreases even more. Principle …

## Diffraction of light

Diffraction of light is the bending of light waves around the edges of opaque objects and the penetration of light into the region of geometric shadow. Diffraction of light is a characteristic of all waves and is observed in cases where: The condition for observing diffraction is given by: r ≥ d2 / λ Where: …

## Ohm’s Law

Ohm’s Law This law takes into account the key quantitative characteristics of an electric circuit: Ohm’s Law А law stating that electric current is proportional to voltage and inversely proportional to resistance. To describe an electric circuit that does not contain EMF, you can use Ohm’s law for a section of the circuit. This is …

## 1n4007 diode datasheet

## Light

Зміст1 How Light is Generated2 Sources of Light3 Light Phenomena3.1 Dispersion of Light3.2 Interference of Light3.3 Diffraction of Light4 Geometric Optics (Propagation of Light) Light is electromagnetic radiation that is perceived by the human eye. The human eye detects electromagnetic waves with wavelengths ranging from 380 to 760 nanometers (nm). The short-wavelength boundary is typically …

## Floodlight

Зміст0.1 Types of Floodlights By lamp type:0.2 By application:0.3 LED Floodlight0.4 Metal Halide Floodlight0.5 Xenon Floodlight0.6 Mercury Vapor Floodlight0.7 Plasma Floodlight0.8 Incandescent Floodlight0.9 Infrared Floodlight1 Theatrical Floodlights1.1 Single-Lens Floodlights1.2 Low-Voltage Floodlights1.3 Parabolic Reflectors (Par Cans)1.4 Profile Spotlights1.5 Followspots1.6 Scanners1.7 Moving Heads1.8 Color Changers2 Industrial Floodlights Floodlight. Floodlights are designed to illuminate distant objects or provide …

## Semiconductor

## Electric current

Зміст1 Electrification of a body2 Conductors, semiconductors, dielectrics3 Action of Electric Current4 Chemical Action of Current.5 Magnetic effect of current.6 Electric Current7 Electric potential difference8 Electric resistance9 Ohm’s Law for a Circuit Element10 Electrical work11 Electric current power12 Expression of electrical work through power13 Heating of conductors by electric current (Joule-Lenz law) Electric current is …

## Table lamp

How to choose a table lamp and use it effectively to maximize its benefits and convenience in operation: Lamp Placement A desk lamp or table lamp is a device that helps create comfortable lighting for your workspace. Choosing the right placement is crucial. The height of the desk lamp should be raised above the working …