ElectromagnetMagnetic Field of a Current-carrying Straight WireA magnetic field will be generated when a current flows through a wire. The magnetic field forms by straight wire are concentric circles around the wire as shown in the figure above. If the direction of the current is inversed, the direction of the magnetic field line is also inversed. Strength of the Magnetic FieldThe strength of the magnetic field form by a current carrying conductor depends on:
Field Pattern of a Flat CoilThe direction of the field can be determined by the Right Hand Grip Rule. Grip the wire at one side of the coil with your right hand, with thumb pointing along the direction of the current. Your other fingers will be pointing in the direction of the field. Card 11: Determining the Pole of the Magnetic Field - Right Hand Grip Rule
Determining the Pole of the Magnetic Field - Right Hand Grip RuleImagine your right-hand gripping the coil of the solenoid such that your fingers point the same way as the current. Your thumb then points in the direction of the field. Since the magnetic field line is always coming out from the North Pole, therefore the thumb points towards the North Pole. Card 12: Solenoid - Strength of the Magnetic Field
Strength of the Magnetic Field The strength of the magnetic field can be increased by
Table of Content
8.1 Magnetism (Revision) 8.2 Electromagnet 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 8.8 Transformer 8.9 Sources of Energy and Generation of Electricity 8.10 Transmission of Electricity Back to Main Table |
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