what are solenoids used for in electrical circuits?

Question

does anyone knows why do we use solenoids or limit solenoids in electrical circuits how does they work and what is their function
can anyone help

Answer 1

A solenoid is basically a coil of wire wrapped around a metal post. When electricity is applied to the coil of wire, it magnetizes the metal post causing it to be pulled or pushed. A contact mechanism is usually connected to the post so that when the post moves it either makes or breaks contact. This system allows for something of very high voltage or amps to be operated by a very low voltage source.

Answer 2

Solenoids are used in a variety of ways in electrical circuits.

Contactors are used to switch high amperage, single or three phase circuits using low amperage, single phase switches. That is probably the most common use - using low power switches to power up high power devises. This is much more economical and safer than expensive three phase switches and and the associated heavy gage wiring that would otherwise be necessary.

Solenoids can also be used to convert electrical power to mechanical power for latches or other purposes where a quick, short, lateral motion is needed. Solenoid valves can also control the flow of liquids or gas.

Answer 3

A solenoid is a loop of wire, often wrapped around a metallic core, which produces a magnetic field when an electrical current is passed through it. Solenoids are important because they can create controlled magnetic fields and can be used as electromagnets.
Electromagnets are used in many situations where a rapidly or easily variable magnetic field is desired. Many of these applications involve deflection of charged particle beams; the cathode ray tube and mass spectrometer fall into this category.
Other devices cause electromagnetic fields to interact with fields from permanent magnets or induced fields from ferromagnetic materials to produce forces. Electromagnetic actuators take advantage of the fact that, if a ferromagnetic core is displaced toward one end of a solenoid, a force will occur which tends to center the core within the solenoid. Also, a nearby plate of steel will be strongly attracted to the core within the solenoid. Typical uses include relays, electromagnetic door locks, and solenoid valves. Doorbells and similar devices are commonly made by causing the moving core to strike a bell.
A quadrupole ("four-pole") electromagnet, used to focus particle beams in a particle accelerator. There are four steel pole tips: two opposing magnetic north poles and two opposing magnetic south poles. The steel is magnetized by a large electric current that flows through coils (not shown) wound around each core.Electromagnets are the essential components of many circuit-breakers, they are used in cars in electromagnet brakes and clutches. In some trams, electromagnetic brakes grip directly on to the rails. Very high powered electromagnets are even used to lift heavy scraps of iron and steel, and to magnetically separate metals at junkyards and recycling centers. Magnetic levitation trains use powerful electromagnets to hover without touching the track. Some trains use attractive forces, while others use repulsive forces.
Electromagnets are used in a rotary electric motor to produce a rotating magnetic field that turns the rotor, or in a linear motor to produce a traveling magnetic field that propels the armature. Although silver is the best conductor of electricity, copper is the most often used conductor due to its low cost, and aluminum is sometimes used to save weight and cost.
Electric guitars also use electro-magnetic pickups, which sense the motions of the strings. The pickup converts mechanical energy into a small electrical signal which is then amplified.

Answer 4

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RE:
what are solenoids used for in electrical circuits?
does anyone knows why do we use solenoids or limit solenoids in electrical circuits how does they work and what is their function
can anyone help

Answer 5

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Unfortunately, the word "work" can mean a few different things. It can mean applied mechanical energy or it can mean changing one form of energy into another. Your teacher has something in particular in mind. I'm going to *guess* it's mechanical energy. I can think of three devices right off my head that change electrical energy into mechanical. One is a motor. Another is a solenoid. Yet another is a transducer.

Answer 6

one way to check for continuity is get a multi meter with an ohm setting put on lead on the wire at the breaker (breaker off) and the other to the ground or neutral if # show up or you hear a tone then there is a short next you can use the same setting go to a receptacle and put one lead on the neutral and the other on the ground if it tones that's a good thing that means the neutral goes all the way back to the panel next is to see if you have power coming from the breaker, set the meter to volts but be careful there are 2 settings for volts 1 for A/C 1 for DC the 1 with the wavy line above the v is what you want 1 lead on the wire from the breaker the other on the ground bar if you have voltage then check to see if there is a GFCI and the reset button is pushed in, if this is too long let me know and i'll try to walk you through it on messenger. 1 more thing check the joints in the j=box with the power off and see if they are still good