A magnet or electromagnet.
There are no vacuum tubes in a transistor. A vacuum tube is an electronic device that uses a heated cathode in a vacuum to direct and control an electron stream to an anode, also known as the plate. The vacuum tube is old technology, but it is still used today, typically in high power applications such as transmitters. A transistor is an electronic device that uses solid-state semiconductors to similarly control an electron stream. The transistor is newer than the vacuum tube. It offers lower power, smaller size, easier use and other enhancements over vacuum tubes, within limits, of course, such as voltage and power.
electronic system used in multiplex theatres
Simple electronic circuits are used in simple electronic devices.
Millman's theorem
You don't, there aren't any. However some radios in the early 1950s did use both vacuum tubes and transistors. This was because early junction transistors were too slow to operate at RF so vacuum tubes were used in the RF and IF sections. These radios were called hybrid radios because they used both vacuum tubes and transistors.
Either an electrostatic field or a magnetic field. Each type is used in cathode ray tubes: generally, electrostatic in oscilloscopes, magnetic in television and computer CRTs.
ENIAC
3M Produces an electronic Vacuum cleaner. Just google 3m electronic vacuum cleaner and it will show up. Do not confuse this for being safe for cleaning live circuits. It is just ground protected to not short out circuitry.
vacuum tubes
Tube count refers to the number of vacuum tubes or electron tubes present in an electronic device. Vacuum tubes are electronic components used to amplify, switch, or create electrical signals in various electronic devices such as radios, televisions, and amplifiers. The tube count helps determine the complexity and functionality of the electronic device in which they are used.
Vacuum tubes were used back in the 19th century and mid-20th century for a number of things. At first they were used just in scientific areas, but then they were used as electronic amplifiers. They were eventually used in the first computers.
An electronic vacuum pump is a device designed to create a vacuum or low-pressure environment using electronic components and mechanisms. These pumps are often used in applications such as automotive systems (e.g., brake boosters), air conditioning, and various industrial processes. Electronic vacuum pumps can operate independently or be integrated into larger systems, providing controlled suction and pressure conditions for specific applications. They play a vital role in ensuring the proper functioning of systems that require a vacuum, such as in automotive brake systems where they assist in enhancing braking efficiency.
vacuum tubes
Beams of charged atomic particles are streams of atoms or ions that have been electrically charged. These beams are commonly used in various scientific and industrial applications, such as in particle accelerators for research in nuclear physics, as well as for material analysis and modification. They can also be employed in medical settings for radiation therapy.
vacuum tubes or transistors to control the flow of current in amplifiers or electronic circuits.
The different types of beams used in house construction include wood beams, steel beams, and reinforced concrete beams. Wood beams are commonly used for their versatility and cost-effectiveness, while steel beams are known for their strength and durability. Reinforced concrete beams are also popular for their ability to support heavy loads and resist fire and moisture damage.
Vacuum tubes are electronic devices that control the flow of electrons in a vacuum. They were widely used in early computer and radio technology before being replaced by transistors. Vacuum tubes can amplify signals and are known for their warm, vintage sound in audio equipment.