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

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

### 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

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

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

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

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

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

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