detector de Field strenge

[Adrian Pop]

Aliexpress.com : Buy Magnetic detector meter field strength test ...AliExpress.com750 × 486Căutați după imagine... Magnetic detector meter field strength test instruments Monopoly alarm sound light radiated electromagnetic radiation tester pen ...

[Adrian Pop]

Field Strength Sensor for Wifi ISM band (2,4GHz)PE2ER.nl640 × 511Căutați după imagineDerde Poging

[Adrian Pop]

Compare Prices on Magnetic Field Detector- Online Shopping/Buy Low ...AliExpress.com1000 × 1000Căutați după imagineFree Shipping Magnetic detector meter field strength test instruments radiated electromagnetic radiation pen tester(China

Magnetic detector meter field strength test instruments Monopoly alarm sound light radiated electromagnetic radiation pen tester

Brand Name: None ; Model Number: wx-2323

Magnetic detector meter field strength test instruments Monopoly alarm sound light radiated electromagnetic radiation pen tester

Brand Name: None ; Model Number: wx-2323
Shenzhen Detectorworld Co.,LtdShenzhen Detectorworld Co.,Ltd


US $6.84 / piece
Discount Price:US $6.50 /piece
5% off2 days left

[COLOR=red !important]Find more deals on the app



Shipping:US $7.43 to Romania via China Post Registered Air Mail
Estimated Delivery Time:29-51days

Quantity: piece (100 pieces available)
Total Price:US $13.93


Buy NowAdd to CartAdd to Wish List (2 Adds)


Return Policy:Returns accepted if product not as described, buyer pays return shipping fee; or keep the product & agree refund with seller. View details
Seller Guarantees:On-time Delivery60 days

Payment:

• View More

Buyer Protection

• Full Refund if you don't receive your order
• Full or Partial Refund , if the item is not as described

Learn More

[/COLOR]

[Adrian Pop]

Applying Electric Field Sensing to Human-Computer InterfacesSIGCHI248 × 319Căutați după imagineContours of electric field strength in plane Z = 0.9 (measured in units of the dipole spacing) predicted by analytical model.










https://www.google.ro/search?q=detec...LXm31-ZzlyM%3A

[Adrian Pop]

Near and far field - WikipediaWikipedia300 × 222Căutați după imagineClassical EM modelling[edit]





Near and far field - WikipediaWikipedia300 × 222Căutați după imagineClassical EM modelling[edit]

[Adrian Pop]

[Adrian Pop]

Electronix: EMF (Electro Magnetic Field) detectorElectronix327 × 353Căutați după imagineEMF (Electro Magnetic Field) detector

[Adrian Pop]

A solenoid is a long coil made up of a numbers of turns of wire.

Magnetic Field Pattern

1. Figure (a) illustrates the field pattern produced by a solenoid when current pass through it.
2. The field lines in the solenoid are close to each other, indicates that the magnetic field is stronger inside the solenoid.
3. We can also see that the field lines are parallel inside the solenoid. This shows that the strength of the magnetic filed is about uniform inside the solenoid.
4. We can also see that the magnetic field of a solenoid resembles that of the long bar magnet, and it behaves as if it has a North Pole at one end and a South Pole at the other.

(Figure (a): Magnetic field pattern of a solenoid)

Determining the Pole of the Magnetic Field

1. The pole of the magnetic field of a solenoid can be determined by the Right Hand Grip Rule.
2. Imagine your right-hand gripping the coil of the solenoid such that your fingers point the same way as the current. Your thumb then points in the direction of the field.
3. Since the magnetic field lines always come out from the North Pole, hence the thumb points towards the North Pole.

[Figure (b)]

1. There is another method can be used to determine the poles of the magnetic field forms by a solenoid.
2. Try to visualise that you are viewing the solenoid from the 2 ends as illustrated in figure (c) below.
3. The end will be a North pole if the current is flowing in the aNticlockwise, or a South pole if the current is flowing in the clockwiSe direction.

Strength of the Magnetic Field
The strength of the magnetic field can be increased by

1. increasing the current,
2. increasing the number of turns per unit length of the solenoid,
3. using a soft-iron core within the solenoid.

Physics Animation
Applet
Compass in a Solenoid

[Adrian Pop]

[Adrian Pop]

Electric Charge

Charge is the property of subatomic particle that gives rise to electric fields. The charge of a particle can be negative, positive, or neutral. Charge is a fundamental property of matter.

By Geek3 [GFDL or CC-BY-SA-3.0], via Wikimedia Commons	By Geek3 [GFDL or CC-BY-SA-3.0], via Wikimedia Commons
This is an illustration of a positive electric charge. The field lines are always depicted as heading away from a positive charge. This is purely a convention of the electromagnetic model. It is based on the direction of a positive charge in the field.	This is an illustration of a negative electric charge. The field lines are always depicted as heading into the negative charge. This is purely a convention of the electromagnetic model. It is based on the direction of a positive charge in the field.
Based on work by Chanchocan (Own work) [GFDL, CC-BY-SA-3.0 or CC-BY-SA-2.5-2.0-1.0], via Wikimedia Commons	Based on work by Chanchocan (Own work) [GFDL, CC-BY-SA-3.0 or CC-BY-SA-2.5-2.0-1.0], via Wikimedia Commons
Put two positive charges together and the force lines repel each other bending away from the other charge. This results in the two positive charges repelling each other.	Put two negative charges together and The force lines repel each other bending away from the other charge. This results in the two negative charges repelling each other.