Deduction of Ohm's Law|Mobility of Charge carriers|Relation b/w E.current and Mobility for a conductor|Relation b/w E.current and Mobility for semi-conductor|Limitation of Ohm's Law|Superconductivity|Meissner effect|Resistances in Series and Parallel

Define the term mobility of charge carriers in a current carrying conductor. Obtain the relation for mobility in terms of relaxation time.

Relation Between Current and Conductivity || Ohm's Law || V-I Graphs || Ohmic & non-Ohmic Conductors

Drift Velocity|Relation Of Drift Velocity And Current|OHM's Law|Mobility

Revision |Relation Between Electric Current And Drift Velocity |Ohm's Law|Mobility |Battery

Write the mathematical relation between mobility and drift velocity of charge carriers in a coductor. Name the mobile charge carriers responsible for conduction of electric current in (a) an electrolyte (b) an ionised gas.

Average and instantaneous current | Drift velocity | Mobility| Current density | Ohm's experimental law | Ohm's Law from drift velocity | Temperature dependence of resistivity for conductors | semi comductors and super conductors | Temperature dependence of resistance

Using the microscopic form of Ohm's law (J=sigma E) , prove that conductivity of a metal can be written as sigma="ne"mu . Here n is the number of free electrons per unit volume and mu is mobility of free electrons . In case of semiconductors there are two types of conduction particles, one is free electrons and the other is known as a hole. Charge on the hole may be assumed to be equal and opposite of that on electron. The number density of free electrons and holes in the semiconducting material are n and p respectively. Assuming mu_e and mu_h as mobility of free electrons and holes respectively , write the exopression of conductivity of the semiconducting material.

In the experiment of Ohm's law, a potential difference of 5.0 V is applied across the end of a conductor of length 10.0 cm and diameter of 5.00 mm. The measured current in the conductor is 2.00 A. The maximum permissible percentage error in the resistivity of the conductor is :