Electrostatics

The Potentiometer is an instrument used for the measurement of potential difference (Figure). It consists of a ten metre long uniform wire of manganin or…

A potentiometer is a mechanism used to evaluate the e.m.f. (electromotive force) of two cells, to calculate the internal resistance of a cell, and potential…

Comparison of emf and potential difference: The difference of potentials between the two terminals of a cell in an open circuit is called the electromotive…

Kirchoff’s voltage law states that the algebraic sum of the products of resistance and current in each part of any closed circuit is equal to…

Kirchoff’s current law states that the algebraic sum of the currents meeting at any junction in a circuit is zero. The convention is that, the…

The potentiometer is a device used to measure the internal resistance of a cell and is used to compare the e.m.f. of two cells and…

The wire wound resistors are expensive and huge in size. Hence, carbon resistors are used. Carbon resistor consists of a ceramic core, on which a…

Internal resistance typically means the electrical resistance inside batteries and power supplies that can limit the potential difference that can be supplied to an external…

The resistivity of substances varies with temperature. For conductors the resistance increases with increase in temperature. If Ro is the resistance of a conductor at…

Applications of superconductors: (i) Superconductors form the basis of energy saving power systems, namely the superconducting generators, which are smaller in size and weight, in…