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Thursday, July 28, 2005
Right-Hand Rules: A Guide to finding the Direction of the Magnetic Force
Fmagnetic - The force a magnetic field exerts on a moving charge
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When a charge is placed in a magnetic field, that charge experiences a magnetic force; when two conditions exist:
1) the charge is moving relative to the magnetic field,
2) the charge's velocity has a component perpendicular to the direction of the magnetic field |
The Right-Hand Rules apply to positive charges or positive (conventional) current
| When using the Right-Hand Rules, it is important to remember that the rules assume charges move in a conventional current (the hypthetical flow of positive charges). In order to apply either Right-Hand Rule to a moving negative charge, the velocity (v) of that charge must be reversed--to represent the analogous conventional current. |
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Making illustrations of magnetic field and charge interactions in 3D
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Because the force exerted on a moving charge by a magnetic field is perpendicular to both the the velocity of the charge and the direction of the field, making illustrations of these interactions involves using the two symbols on the left to denote movement into or out of the plane of the page. |
Right-Hand Rule #1 (RHR #1)
Right-Hand Rule #1 determines the directions of magnetic force, conventional current and the magnetic field. Given any two of theses, the third can be found.
Using your right-hand:
point your index finger in the direction of the charge's velocity, v, (recall conventional current).
Point your middle finger in the direction of the magnetic field, B.
Your thumb now points in the direction of the magnetic force, Fmagnetic. |
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Right-Hand Rule #2 (RHR #2)
Right-Hand Rule #2 determines the direction of the magnetic field around a current-carrying wire and vice-versa
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Using your right-hand:
Curl your fingers into a half-circle around the wire, they point in the direction of the magnetic field, B
Point your thumb in the direction of the conventional current.
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Applying the Right-Hand Rules:
The Right-Hand Rules give only the direction of the magnetic field. In order to determine the strength of a magnetic field , some useful mathematical equations can be applied.
| For a long, straight wire, the magnetic field, B is:
B = moI / 2pr;where,
mo = 4p x 10-7 T · m / A and os called the permeability of free space, r is the radial distance from the wire in meters, and I is the current in amperes. |
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For a single loop of wire, the magnetic field, B through the center of the loop is:
B = moI / 2R;where,
mo is the permeability of free space, and R is the radius of the the circular loop of wire, measured in meters. Both the fields for a coil of wire and a solenoid can be constructed from this equation. |
Posted at 11:57 am by nawaitu
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Right-Hand Rules: A Guide to finding the Direction of the Magnetic Force
Monday, March 21, 2005
Posted at 11:30 pm by nawaitu
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flux waveform control
info tentang flux magnetic
Posted at 11:10 pm by nawaitu
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info tentang flux magnetic
Friday, March 11, 2005
k, this is coming conf ..inshaAllah ade rezeki bole cuba
date due sub is 31 march 2005
int conf di jordan
Posted at 07:56 am by nawaitu
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conference
Friday, February 25, 2005
bismillah..
tujuan blog ni utk letakkan ape2 je bende yg berkaitan ngan research...senang sikit nk buat rujukan nnti..tk yah nak cari2 atau add kat fav lagi...atau save kat mana2 pc..mudahan dpt siapkan research ni spt yg telah dirancangkan...ameen
Posted at 09:37 pm by nawaitu
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tujuan blog
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