Home Physics Moving Charges and Magnetism

Moving Charges 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 (only qualitative treatment), 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 uniform magnetic field; moving coil galvanometer-its current sensitivity and conversion to ammeter and voltmeter.

Force on a current carrying conductor placed in a magnetic field

Force on a current carrying conductor placed in a magnetic field

Let us consider a conductor PQ of length l and area of cross section A. The conductor is placed in a uniform magnetic field...
Moving coil galvanometer

Moving coil Galvanometer

Moving coil galvanometer is a device used for measuring the current in a circuit. Fig. The moving coil galvanometer. Its elements are described in the...
Cyclotron

Cyclotron

A cyclotron is a device used to accelerate charged particles to high energies. It was devised by Lawrence. Principle: Cyclotron works on the principle that...
Torque experienced by a current loop in uniform magnetic field

Torque experienced by a current loop in uniform magnetic field

Let us consider a rectangular loop PQRS of length l and breadth b (Fig). It carries a current of I along PQRS. The loop is placed in a...
Force between two parallel current-carrying conductors – definition of ampere

Force between two parallel current-carrying conductors – definition of ampere

AB and CD are two straight very long parallel conductors placed in air at a distance a. They carry currents I1 and I2 respectively.(Fig 3.23) The...
Motion of a charged particle in a uniform magnetic field

Motion of a charged particle in a uniform magnetic field

Let us consider a uniform magnetic field of induction B acting along the Z-axis. A particle of charge q and mass m moves in XY plane. At a...
Magnetic Lorentz force

Magnetic Lorentz force

Let us consider a uniform magnetic field of induction B acting along the Z-axis. A particle of charge + q moves with a velocity v...
Magnetic Field inside a Straight Solenoid

Magnetic Field inside a Straight Solenoid

A solenoid means an insulated copper wire wound closely in the form of a helix. Where n is no. of turns per unit length, a...
Magnetic Field due to a toroidal Solenoid

Magnetic Field due to a Toroidal Solenoid

A solenoid bent into the form of a closed ring is called a toroidal solenoid. Note: The magnetic field exists only in the tubular area...
Biot-Savart law

Biot-Savart law

Biot and Savart conducted many experiments to determine the factors on which the magnetic field due to the current in a conductor depends. The results...