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Tips and Tricks for Magnetic effect of Current and Magnetism

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The force exerted by an electric field is always collinear to the field where as the force exerted by a Magnetic Field is always perpendicular to the direction of field. Whereas the source of electric field is an electric charge, the source of magnetic field is a current element (not a magnetic charge)

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The magnetic field due to a straight conductor is zero, when the observation point lies along the length of the conductor.

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Tip #8

For a point on the axis of a circular coil carrying current, magnetic field is maximum at the centre of the coil.

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Tip #9

For numerical problems involving two coaxial solenoids having different cross sectional areas then the, cross section area of the inner solenoid is to be considered for calculation of mutual inductance.

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Tip #10

If the lengths of the two co-axial solenoids are different, then the length of the bigger solenoid is to be considered in the numerical calculation of mutual inductance.






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