Force on a Current-carrying Conductor in a Magnetic Field
Fleming's Left Hand Rule (Motor Rule)
The direction of the force can be determined by Fleming's left hand rule
The fore finger, middle finger and the thumb are perpendicularly to each other. The forefinger points along the direction of the magnetic field, middle finger points in the current direction and the thumb points along the direction of the force.
The Catapult Field
The interaction of the two magnetic fields (the magnetic field of the current-carrying wire and the magnetic field of the permanent magnet) produces a resultant field known as catapult field as shown in the figure above.
The non-uniform field produces the catapult force from the stronger field to the weaker field.
Force between 2 current carrying conductor
When 2 current carrying conductors are placed close to each other, a force will be generated between them.
Force between 2 current carrying conductor - How it's produced and the field pattern?
This force is due to the interaction between the magnetic field of the 2 conductor. The figure above shows the catapult field produced by 2 current carrying conductors when their current is in the same direction or opposite direction.
Turning Effect of a Current-carrying Coil in a Magnetic Field
If a current carrying coil is placed in a magnetic field, a pair of forces will be produced on the coil. This is due to the interaction of the magnetic field of the permanent magnet and the magnetic filed of the current carrying coil.
Direct Current Motor
Electric motor converts electrical energy to kinetic energy. It consist a rectangular coil of wire placed between 2 permanent magnets. The coil are soldered to a copper split ring known as commutator. 2 carbon brushes are held against the commutator.
Table of Content
8.1 Magnetism (Revision)
8.3 Application of Electromagnet
8.4 Force on a Current-carrying conductor in magnetic Feild
8.5 Elctromagnetic Induction
8.6 Application of Electromagnetic induction
8.7 Alternating Current
8.9 Sources of Energy and Generation of Electricity
8.10 Transmission of Electricity
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