Published On: Thu, Oct 28th, 2021

A LITTLE BASIC IN ELECTRICAL ENGINEERING

A LITTLE BASIC IN ELECTRICAL ENGINEERING

Author: Radoje Jankovic

A LITTLE BASIC IN ELECTRICAL ENGINEERING 1.

Did you learn electric fields?

Separation of electricity in an inhomogeneous electrostatic field.

It is similar with electric fields with different shapes of electrodes.

Fig. 1.

A LITTLE BASIC IN ELECTRICAL ENGINEERING 2.

Electric field of a capacitor with parallel plates.

MALO OSNOVA IZ ELEKTROTEHNIKE 2.

Električno polje kondenzatora sa paralelnim pločama.

Fig. 2.

A LITTLE BASIC IN ELECTRICAL ENGINEERING 3.

Electric field between a sphere and a plane

MALO OSNOVA IZ ELEKTROTEHNIKE 3.

Električno polje između kugle (svere) i ravni

Fig. 3.

A LITTLE BASIC IN ELECTRICAL ENGINEERING 4.

Electric field between two spheres

MALO OSNOVA IZ ELEKTROTEHNIKE 4.

Električno polje među dvema kuglama (svera)

Fig. 4.

A LITTLE BASIC IN ELECTRICAL ENGINEERING 5.

Electric field inside the electroscope.

MALO OSNOVA IZ ELEKTROTEHNIKE 5.

Električno polje u unustrašnjosti elektroskopa.

Fig. 5.

A LITTLE BASIC IN ELECTRICAL ENGINEERING 6.

Separation of electricity in an electric field. Influenza ie. 

Left image: The plates will touch

Right image: The c and d plates are separated – spaced apart

MALO OSNOVA IZ ELEKTROTEHNIKE 6.

Razdvajanje elektriciteta u električnom polju. Influenca tj. Influencija.

Leva slika: Ploče c i de se dodiruju

Desna slika: Ploče c i d su razdvojene – razmaknute

Fig. 6.

A LITTLE BASIC IN ELECTRICAL ENGINEERING 7.

Magnetic field of permanent magnet and coil – air solenoid

Left image: permanent magnet field,

Right image: Povlje of the air thread or air solenoid.

If you have a real permanent magnet and small iron shavings, you can make a demonstrator of the magnetic field by placing a transparent plexiglass – clearite above the magnet.

You can also find copper wires with a diameter of your choice and make an air solenoid yourself when you mount it on a clear plate that you have to drill as shown in the picture and carefully thread the solenoid threads. Tiny iron shavings are also used to demonstrate the magnetic field.

You can also make iron shavings yourself. You need a metal files and a piece of iron sheet and you get small shavings by filing.

MALO OSNOVA IZ ELEKTROTEHNIKE 7.

Magnetno polje permantntnog magneta i navojnice – vazdušnog solenoida

Leva slika: polje permanentnog magneta,

Desna slika: Povlje vazdušne navojnice odnosno vazdušnog solenoida.

Ako imate prav permanentni magnet i sitnih gvozdenih opiljaka možete napraviti demonstrator magnetnog polja tako što ćete iznad magneta staviti providni pleksiglas – klirit.

Takođe možete pronaći bakarne žice prečnika po volji i sami napraviti vazdušni solenoig koga montirate na kliritnu ploču koju morate izbušiti kako se vidi na slici i pažljivo provući navojke solenoida. Za demonstraciju magnetnog polja se takođe  koriste sitni gvozdeni opiljci.

Gvozdene opiljke takođe možete sami napraviti. Treba vam grupa turpija za metal i parče gvozdenog lima te turpijanjem dobijate sitne opiljke.

Fig. 7.

A LITTLE BASIC IN ELECTRICAL ENGINEERING 8.

The magnetic field of a horseshoe magnet and a horseshoe coil

Left image: Horseshoe magnet field

Right image: Horseshoe coil field with iron core. You can easily make this soldier yourself by winding a lightly insulated copper wire with a diameter of 1 + mm on a bent iron rod with a diameter of 10 mm.

MALO OSNOVA IZ ELEKTROTEHNIKE 8.

Magnetno polje potkovičastog magneta i potkovičaste zavojnice

Leva slika: Polje potkovičastog magneta

Desna slika: Polje potkovičaste navojnice sa gvozdenim jezgrom. Ovu najvojnicu možete lako sami napraviti tako što na savijenu gvozdenu šipku prečnika 10 mm namotate lakom izolovanu bakarnu žicu prečnika 1 + mm.

Fig. 8.

A LITTLE BASIC IN ELECTRICAL ENGINEERING 9.

Magnetic field of a circular permanent magnet – a circular coil wound on an insulating ring made of some insulating material and a circular coil (toroid)

Left image: Circular – ring magnet does not exhibit magnetic properties on the outside.

Right image: The circular thread shows magnetic fields only inside the thread while it shows no properties on the outside.

MALO OSNOVA IZ ELEKTROTEHNIKE 9.

Magnetno polje kružnog permanentnog magneta – kružnog kalema namotanog na izolacioni prsten od nekog izolacionog materijala i kružne zavojnice (toroida)

Leva slika: Kružni – prstenasti magnet ne ispoljava vani magnetne osobine.

Desna slika: Kružna navojnica pokazuje magnetno polja samo u unutrašnjosti navoja dok spolja ne pokazuje nikakve osobine.

Fig. 9.

A LITTLE BASIC IN ELECTRICAL ENGINEERING 10.

Magnetic field of current

(Magnetic field of a straight conductor through which an electric current flows)

MALO OSNOVA IZ ELEKTROTEHNIKE 10.

Magnetno polje struje

(Magnetno polje pravog provodnika kroz koga protiče električna struja)

Fig. 10.

A LITTLE BASIC IN ELECTRICAL ENGINEERING 11.

The magnetic field of two air coils, ie. two air solenoids mounted on a transparent plexiglass-clearite plate.

MALO OSNOVA IZ ELEKTROTEHNIKE 11.

Magnetno polje  dveju vazdušnih navojnica tj. dva vazdušna solenoida koji su montirani na providnoj ploči od pleksiglasa-klirita.

Fig. 11.

A LITTLE BASIC IN ELECTRICAL ENGINEERING 12.

A conductor with a current in a magnetic field

12. image: Magnetic field of a real conductor

13. image: The main (external) magnetic field of a straight conductor

14. image: The resulting magnetic field.

MALO OSNOVA IZ ELEKTROTEHNIKE 12.

Provodnik sa strujom u magnetnom polju

Prva slika: Magnetno polje pravog provodnika

Druga slika: Glavno (spoljašnje) magnetno polje pravog provodnika

Treća slika: Rezultujuće magnetno polje

Fig. 12.
Fig. 13.
Fig. 14.

Materials from author’s documentation.

About the Author

- Radoje - Rade Jankovic Electrician, Electrical Technician, Electrical Engineer, PhD, Ecologist, Environmentalist, Designer, Educator, Investigator... Today PROFESSIONAL TECHNICAL WRITER AND DOCUMENTATOR Massive practical experience in almost all fields of electrical engineering over 40 years. My International education group in Facebook: EEEW - ELECTRICAL & ELECTRONIC EDUCATION WORLD where published more than 8000 small or bigger articles, lessons, technical advice, projects, technical calculations, test questions with and without answers, illustrated test questions with and without answers; all my original works and few thousands of may original photos from practice, drawings, circuit diagrams, environmental lessons and examples from everyday practice etc., etc.

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A LITTLE BASIC IN ELECTRICAL ENGINEERING