What is Potentiometer?
Physics

What is Potentiometer?

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…
Comparison of emfs of two given Cells Using Potentiometer
Physics

Comparison of emfs of two given Cells Using Potentiometer

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
Physics

Comparison of emf and Potential Difference

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…
Describe Kirchoff’s Voltage Law
Physics

Describe Kirchoff’s Voltage Law

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
Physics

Kirchoff’s Current Law

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…
Determination of Internal Resistance of a Cell Using Voltmeter
Physics

Determination of Internal Resistance of a Cell Using Voltmeter

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…
Define and Describe on Carbon Resistors
Physics

Define and Describe on Carbon Resistors

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…
What is Internal Resistance of a Cell?
Physics

What is Internal Resistance of a Cell?

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…
How Temperature Dependence of Resistance?
Physics

How Temperature Dependence of Resistance?

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
Physics

Applications of Superconductors

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…
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