We seen how magnetic field behaves when interact with conductor, as today we know motors. What makes a motor rotate by itself without starting by external force? This kind of question commonly everyone has. Well dummies it's all about Lorentz force. So lets discuss about Lorentz force law.
Lorentz force Law says When a electric charge Q flows in a magnetic field B,The force occur in both the direction of magnetic field and charge are perpendicular.
This is easily determined by Right Hand rule and Right hand Fleming's rule too. The right hand rule indicate the thumb as the direction of current flows and other 5 fingers refer to the direction of magnetic field. While in Fleming's right hand rule state is force is perpendicular to the direction of current flows and the direction of magnetic field.
This force created by electric charge such as electron flows in a conductor that exert in magnetic field. When the electron moves in the magnetic field, it feels a force that might the force goes upward or downward. This force cannot be don't if the electron move parallel to the magnetic field. This is because the force will be zero if move parallel to the magnetic field. The equation for this will be :
This is easily determined by Right Hand rule and Right hand Fleming's rule too. The right hand rule indicate the thumb as the direction of current flows and other 5 fingers refer to the direction of magnetic field. While in Fleming's right hand rule state is force is perpendicular to the direction of current flows and the direction of magnetic field.
This force created by electric charge such as electron flows in a conductor that exert in magnetic field. When the electron moves in the magnetic field, it feels a force that might the force goes upward or downward. This force cannot be don't if the electron move parallel to the magnetic field. This is because the force will be zero if move parallel to the magnetic field. The equation for this will be :
Applications Of Lorentz's Force Law
1. Electric Motors
Electric motors are run by this force. Example your toy car DC motor. When the conductor in rotor by external DC power supply, the rotor will rotate.
2.Northern Lights (Aurora)
When solar charge particles hit the earth magnetosphere (Earth's Magnetic Field),The particle will spiral along with earth's magnetic field and get the beautiful northern light.
3.Speaker
When a speaker's coil is energize it's vibrate the diaphragm with the permanent magnet due to the Lorentz force generate in the coil,
WELL DUMMIES I HOPE YOU UNDERSTAND MORE ABOUT ELECTRICAL. IF HAVE ANY QUESTION OR TOPIC TO DISCUSS, COMMENT BELOW OR CONTACT ME
Careful, the right hand rule here is probably mistaken. See the wikipedia image for the correct way. https://upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Right_hand_rule_cross_product_F%3DI%C3%97B.svg/1200px-Right_hand_rule_cross_product_F%3DI%C3%97B.svg.png
ReplyDeleteI agree, I think the magnetic field and electric current arrows are swapped
ReplyDeleteyes, I was also confused. Little trick of mine to remember the correct order (not for kids):
ReplyDeleteFBI
F: think about F*ck, at your middle finger
B: finger above, so at your index finger
I: at your thumb, how do you point yourself?
That works all the time for me, hope it helps!
The genius who wrote this article calls us dummies...
ReplyDeleteQuote: "The right hand rule indicate the thumb as the direction of current flows and other 5 fingers refer to the direction of magnetic field"