^At centre of arc
At centre of arc Magnetic field at centre of arc is Use θ in radians. Contribution of straight parts at C is zero.
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^Circular ring
Circular ring Magnetic field on the axis of a circular ring To find field at C use r = R & r = x for far away point. Magnetic field is maximum at centre of ring, it is
^Straight thin finite conductor
Straight thin finite conductor Magnetic field at point P around a straight thin finite conductor is On a thin conductor magnetic field is not defined.
^Arbitrary current carrying conductor
Arbitrary current carrying conductor Magnetic field at point P around a conductor of arbitrary shape Here is called current element.
^Moving point charge
Moving point charge Magnetic field at point P for a point charge ‘+q’ moving with velocity is In any arbitrary volume of conductor net negative & positive charge is equal, thus net charge enclosed for any section is zero, hence electric field outside a current carrying conductor is zero. Also if an observer moves along […]
^Facts
Facts → Induced magnetic field or magnetic induction vector or magnetic flux density. SI unit of : weber/meter2 or tesla (T) CGS unit: maxwel/cm2 or gauss (G) 1 T = 1 N A-1 m – 1 = Wb m-2 = 10 4 Gauss μ0 = 4 π x 10 – 7 A– 1 Tm = 12.75 […]
^Biot–savart’s law
Biot–savart’s law The magnitude of the magnetic field produced depends upon strength of current flowing in the conductor shape, size of conductor & position of observation point where the field is to be calculated. Direction of magnetic field due to both straight as well as curved conductor can be calculated by right hand stretched thumb […]
^Oersted observation
Oersted observation Oersted (1820) was the first to discover magnetic field associated with a current carrying conductor. He found that if a wire carrying a current from South to North is placed Over a magnetic needle, then the north pole the needle gets deflected towards the West. This is named as SNOW rule.
^Vector addition law
^Vector addition law The essential condition for the addition of the two vectors that they should of the same physical nature e.g. force can be added in to force, velocity can be added in to velocity only.
*Describing a vector
*Describing a vector A vector can be expressed as infinite no. of components in 2D or 3 D, however generally a vector is expressed as the resolution of three mutually perpendicular components a, b & c along x, y & z axis respectively. Here (a, b, c) are also called direction ratios of . Length […]
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