AC Generator
AC Generator:
AC generator is the one which produces a current that alternates or changes its direction regularly after a fixed interval of time, i.e.,...
Magnetic Dipole Moment of a Revolving Electron
According to Neil Bohr’s atom model, the negatively charged electron is revolving around a positively charged nucleus in a circular orbit of radius r....
Astronomical Telescopes
Astronomical Telescopes
It is used to observe distinct images of heavenly bodies.
It consists of 2 lenses, the objective lens O of large focal length and...
Bar Magnet as an Equivalent Solenoid
To demonstrate the similarity of a current carrying solenoid to a bar magnet, let us calculate axial field of a finite solenoid carrying current.
Consider:...
Transformer
A transformer is an electrical device used for converting low alternating voltage into a high alternating voltage and vice versa. It transfers electric power...
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...
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...
Combination of cells in series And Parallel
Combination of cells in series
When external resistance is negligible in comparison to the internal resistance, then the cells are connected in parallel to get maximum...
Current Loop as a Magnetic Dipole
Magnetic dipole:
An arrangement of two equal and opposite magnetic poles separated by a small distance is called a magnetic dipole.
Magnetic dipole moment:
The magnetic dipole...
Torque on a Bar Magnet Placed in a Uniform Magnetic Field
Consider a bar magnet NS of length 2l and pole strength m placed in a uniform magnetic field of induction B at an angle θ...