NEET UG syllabus mecm

UNIT III: Magnetic Effects of Current and Magnetism ? Concept of magnetic field, Oersted’s experiment. Biot-Savart law and its application to current carrying circular loop. ? Ampere’s law and its applications to infinitely long straight wire, straight and toroidal solenoids. Force on a moving charge in uniform magnetic and electric fields. Cyclotron. ? Force on a current-carrying conductor in a uniform magnetic field. Force between two parallel current-carrying conductors-definition of ampere. Torque experienced by a current loop in a magnetic field; moving coil galvanometer-its current sensitivity and conversion to ammeter and voltmeter. ? Current loop as a magnetic dipole and its magnetic dipole moment. Magnetic dipole moment of a revolving electron. Magnetic field intensity due to a magnetic dipole (bar magnet) along its axis and perpendicular to its axis. Torque on a magnetic dipole (bar magnet) in a uniform magnetic field; bar magnet as an equivalent solenoid, magnetic field lines; Earth’s magnetic field and magnetic elements. ? Para-, dia-and ferro-magnetic substances, with examples. ? Electromagnetic and factors affecting their strengths. Permanent magnets.

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