Good conductors have excess of free electrons. ____________

A current of 4 A is flowing in a cylindrical conductor. The number of free electrons passing per second through the cross-section of conductor is

Derive an expression for the resistivity of a good conductor, in terms of the relaxation time of electrons.

When electric field inside a conductor is E, mobility of free electrons inside the conductor is mu . When the electric field is doubled mobility will be

State True or false Molten Na_(2)SO_(4) is a good conductor because of mobile electrons.

Mica is a good conductor of electricity.

Is boron a good conductor of electricity ?

If n,e,A and v_(d) are free electron density inside conductor , charge of electron , area of cross-section of conductor and drift velocity of free electrons inside conductor, then current l through the conductor is

These question consists of two statements each printed as Assertion and Reason. While answering these question you are required to choose any one of the following four responses. Assertion: Good conductors of electricity are also good conductors of heat Reason: In good conductors of electricity, there are large numbers of free electrons.

If n ,e,m and tau are free electron density in conductor , charge of electron, mass of electron and relaxation time of free electrons , then resistivity rho of the conductor can be expressed as

The current of a conductor following through a conductor in terms of the drift speed of electrons is (the symbols have their usual meanings)