How can electricity make magnetic fields?, Physics

Assignment Help:

How can electricity make magnetic fields?

In 1820, Oersted discovered that an electric current can produce a magnetic field. He happened to notice a compass move when he connected a battery to a circuit. Anytime an electric charge moves, it creates an associated magnetic field.

182_How can electricity make magnetic fields 1.png

This is when we introduce the "dreaded" right-hand rule. Correctly executing this maneuver will help you determine the direction of a magnetic field associated with an electric current. Please be sure to set your pencil down and make sure you use your right hand, because even if you only mistakenly use your left hand, you will get the wrong direction! If you point the thumb of your right hand in the direction of positive current (which is opposite the direction of the electron current), the fingers of your right hand will naturally wrap in the direction of the magnetic field reaching out in circles perpendicular to the wire.

1447_How can electricity make magnetic fields 2.png

If we wrap a wire carrying current into a loop, we have the same magnetic field that would appear around an ordinary bar magnet. Another version of the dreaded right hand rule helps us identify the north pole of a solenoid which is just a stack of these loops. If you wrap the fingers of your right hand in the direction of the current in the solenoid, your thumb points in the direction of the north pole of your "electromagnet". If the current is turned off, the magnetic field disappears. If the current is turned on, the magnetic field will appear again.

221_How can electricity make magnetic fields 3.png


Related Discussions:- How can electricity make magnetic fields?

Strains are measured by strain gage elements, A rectangular rosette is moun...

A rectangular rosette is mounted on a test structure as shown, loads are applied, and the following strains are measured by strain gage elements 1, 2, and 3: ε 1 = 1500 μm/ m ε

Describe power of a lens, Describe power of a lens. Write its SI unit. What...

Describe power of a lens. Write its SI unit. What do you mean by linear magnification produced by a lens in a direction perpendicular to its axis? Write down the mathematical expre

Average speed, A boy goes to market with a average speed of 29 km/h.He retu...

A boy goes to market with a average speed of 29 km/h.He returns back half the way he went with a average speed of 40 km/h.Find average speed for whole journey.

LASER, What is LASER? describe the construction and working of He-Ne Laser ...

What is LASER? describe the construction and working of He-Ne Laser with suitable diagram

Field-effect transistor, a)  Sketch the small-signal equivalent circuit for...

a)  Sketch the small-signal equivalent circuit for a field-effect transistor (FET) and explain how it can be deduced from the properties of the real device. b)  Draw the circuit

Basic principles of spectrophotometry, Basic principles of spectrophotometr...

Basic principles of spectrophotometry: An absorbance spectrophotometer is an instrument that measures the fraction of the incident light transmitted through a solution

Constraint relation in pulley., give me a very detailed exlanation of find...

give me a very detailed exlanation of finding d Constraint relaion in strings and how do u find it do set a reference point from which u start taking d Velocities/Accelerations d f

Ultrasonic wave, how ultrasonic wave detect by piezoelectric detector ?

how ultrasonic wave detect by piezoelectric detector ?

Weight removed from earth and it consequences., With mans lust for the unkn...

With mans lust for the unknown in space exploration, what will happen to our planet by removing so much weight in the form of spacecraft that will never return and can the earth re

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd