Firdiana Sanjana ( ) Ana Alina ( ) MAGNETIC FORCE  Right-hand rule  The force on a charged particle in a magnetic field  Magnetic Force Acting on a Current-Carrying Conductor  The Magnetic Force Between Two Parallel Conductors

 The thumb  the vector v  Your fingers  B  Your palm  The force FB on a positive charge RIGHT-HAND RULE

AGREEMENT OF B DIRECTION B directed out of the page B directed into the page DIRECTION OF B

Experiments on various charged particles moving in a magnetic field give the following results:  The magnitude F B of the magnetic force exerted on the particle is proportional to the charge q and to the speed v of the particle.  The magnitude and direction of F B depend on the velocity of the particle and on the magnitude and direction of the magnetic field B.  When a charged particle moves parallel to the magnetic field vector, the magnetic force acting on the particle is zero. THE FORCE ON A CHARGED PARTICLE IN A MAGNETIC FIELD

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MAGNETIC FORCE ACTING ON A CURRENT-CARRYING CONDUCTOR

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Parallel conductors carrying currents in the same direction attract each other, and parallel conductors carrying currents in opposite directions repel each other. THE MAGNETIC FORCE BETWEEN TWO PARALLEL CONDUCTORS

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TORQUE ON A CURRENT LOOP IN A UNIFORM MAGNETIC FIELD For the magnetic field is parallel to the plane of the loop

Torque on a Current Loop in a Uniform Magnetic Field

MOTION OF A CHARGED PARTICLE IN A UNIFORM MAGNETIC FIELD  The particle moves in a circle because the magnetic force F B is perpendicular to v and B and has a constant magnitude qvB. As Figure illustrates, the rotation is counterclockwise for a positive charge. If q were negative, the rotation would be clockwise.

THE CYCLOTRON  A cyclotron is a device that can accelerate charged particles to very high speeds. The energetic particles produced are used to bombard atomic nuclei and thereby produce nuclear reactions of interest to researchers. A cyclotron consists of an ion source at P, two dees D1 and D2 across which an alternating potential difference is applied, and a uniform magnetic field.(The south pole of the magnet is not shown.) The red dashed curved lines represent the path of the particles.

THE HALL EFFECT  When a current-carrying conductor is placed in a magnetic field, a potential difference is generated in a direction perpendicular to both the current and the magnetic field.This phenomenon is known as the Hall effect.

THE HALL EFFECT

 ARIGATOU GOZAIMASU

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