The drift speed is defined as `v_(d)=(Delta l//Delta t)`where `(Delta l)is the distance drifted in a long time `(Delta t).`Why don't we define the drift speed as the limit of `(Delta l//Delta t)`as (Delta t (rarr)0)?

What is significance of T DeltaS in DeltaG = DeltaH - T DeltaS ?

The eqn.(Delta N_n)/(Delta N_t)= B represents which of the following ?

Delta S = Delta H//T holds good for

A quantity X is given by in_(0) L(DeltaV)/(Delta t) , where in_(0) is the permittivity of free space, L is a length, DeltaV is a potential difference and Delta t is a time interval. The dimensional formula for X is the same as that of -

When the temperature of a rod increases from t to t+Delta t , its moment of inertia increases from I to I+Delta I . If alpha is coefficient of linear expansion, the value of Delta I//I is