Difference between revisions of "Motor Effect"
(→About The Motor Effect) |
|||
Line 12: | Line 12: | ||
{| class="wikitable" | {| class="wikitable" | ||
|- | |- | ||
− | |[[File:FlemingsLeftHandRule.png|center| | + | |[[File:FlemingsLeftHandRule.png|center|300px]] |
|- | |- | ||
| style="height:20px; width:200px; text-align:center;" | | | style="height:20px; width:200px; text-align:center;" | |
Revision as of 09:56, 5 March 2019
Key Stage 4
Meaning
The motor effect is the force on a current carrying wire in a magnetic field.
About The Motor Effect
- When an a wire has an electrical current it has a magnetic field. If this wire is in the presence of an external magnetic field the two fields will interact causing a force.
- The magnitude of the force depends upon:
- The Current - The greater the current the greater the force.
- The Magnetic Field - The greater the strength of magnetic field the greater the force.
- The force on a current carrying wire is at right angles to both the current and the magnetic field.
- Fleming's Left Hand Rule can be used to find the direction of the force.
\(\overrightarrow{B}\): First finger field. \(\overrightarrow{I}\): Second finger current. \(\overrightarrow{F}\): The force. |
Equation
Force = (Magnetic Flux Density) x (Current) x (Length)
\(F = BIl\)
Where\[B\] = The Magnetic Flux Density (strength of magnetic field).
\(I\) = The Electrical Current through the wire.
\(l\) = The length of wire inside the magnetic field.
\(F\) = The force on the wire.