The ohm’s law can be derived from the equation J= σE. Consider a segment of wire of length l and cross sectional area A as shown in figure When a potential difference Vis applied across the wire, a net electric field is...
Author - Sasikumar Raja
When a conductor moves in a magnetic field, the direction of motion of the conductor, the field and the induced current are given by Fleming’s right hand rule and is as follows: The thumb, index finger and middle finger of...
Tangent galvanometer is a device used to detect very small currents. It is a moving magnet type galvanometer. Its working is based on tangent law Tangent law When a magnetic needle or magnet is freely suspended in two mutually...
In the year 1929, Robert Van de Graaff designed a machine which produces a large amount of electrostatic potential difference, up to several million volts (107V). This Van de Graff generator works on the principle of...
This is a device used to protect tall buildings from lightning strikes. It works on the principle of action at points or corona discharge. This device consists of a long thick copper rod passing from top of the building to the...
In biphenyl (I) two phenyl groups are linked by a single bond (sp2 -sp2), known as pivotal bond. The distance between ortho H‘s in adjacent rings in the planar conformation is significantly greater (0.29nm) than twice the...
