the unit of electrical resistance is

The unit of electrical resistivity

The unit of conductance is

The unit of mobility is

The unit of drift velocity

The resistance of the most of the conducting materials _________ with increase in temperature.

Resistivity of conductors is most affected by

In metals the type of bond present is

Gold and silver are

Example of high resistivity material is

Metals are good conductors of electricity because

The average distance travelled by an electron

 For metals, relaxation time  $\left(\tau\right)$   is equal to 

Time taken by an electron to reach its equilibrium position from the disturbed position due to the application of external field is

The failure of classical theory in Wiedemann Franz law solved by replacing the mass of _____________ by effective mass

Classical free electron theory explains the conductivity of

According to classical free electron theory, electrons obey

The velocity gained by the electron per unit electric field strength is called

The microscopic form of Ohm's law is

Calculate the drift velocity of the free electrons with a mobility of 3.5 x 10^-3 m² V^-1 s^-1 in copper for an electric field strength of 0.5 V/m

The current density per unit electric field is known as ________

------------------------states that the ratio of thermal conductivity (K) to electrical conductivity (σ) is directly proportional to absolute temperature and this ratio is constant.

The thermal and electrical conductivities of Cu at 20° C are 390 Wm^-1K^-1 and 5.87 ×10⁷ ohm ^-1m^-1 respectively. Calculate the Lorentz number.

According to classical free electron theory, the value of Lorentz number --------