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Ch8+Magnetic+Field

# Ch8+Magnetic+Field - MAGNETIC FIELD ALI ALZAHRANI MAGNETIC...

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M AGNETIC F IELD A LI A LZAHRANI

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M AGNETIC F ORCE C HARGED P ARTICLE Moving charges create an electric current which generates a magnetic field. The magnetic force due to a moving charged particles in a uniform magnetic field is given as This equation indicates that the direction of magnetic force is always normal to both velocity and magnetic field. The SI unit of magnetic field is Tesla (T) where 1 T = 1 N.s/(C.m) = 1 N/(A.m) B v q F
M AGNETIC F ORCE C URRENT The magnetic force due to a current passing through a wire of length L is B L i F

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C HARGED P ARTICLE C IRCULATING IN M AGNETIC F IELD If a charged particle q of mass m and speed v normally enters a uniform magnetic field of B, the path of the particle will be a circle of radius R. The value of the radius is The frequency of the motion, reciprocal of the period, is The angular frequency is qB mv R qB m m qB f 2 2 m qB f 2
E QUAL E LECTRIC AND M AGNETIC F ORCES If a charged particle enters a region of electric and magnetic forces, the particle will move in a straight line when the net force is zero. That means the electric force equals and opposes the magnetic force. The speed of the particle must be This equation is known as velocity selector.

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Ch8+Magnetic+Field - MAGNETIC FIELD ALI ALZAHRANI MAGNETIC...

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