(i) Define ampere in terms of force between two current carrying conductors.
(ii) What is an ideal transformer ?

Answer the following: (a)Define SI unit of current in terms of the force between two parallel current carrying conductors. (b) Two long straight parallel conductors carrying steady currents I_(a)andI_(b) along the same direction are separated by a distance d. How does one explain the force of attraction between them? If a third conductor carrying a current I_(c) in the opposite direction is placed just in the middle of these conductors , find the resultant force acting on the third conductor.

Figure below shows two infinitely long and thin current carrying conductors X and Y kept in vacuum, parallel to each other, at a distance .a.. (i) How much force per unit length acts on the conductor y due to the current flowing through X ? Write your answer in terms of ((mu0)/(4pi)),I_(1),I_(2) and a. (Derivation of formula is not required.), (ii) Define ampere, in terms of force between two current carrying conductors.

(a) Derive an expression for the force between two long parallel current carrying conductors . (b) Use this expression to define S.I. unit of current . (c) A long straight wire AB carries a current I.A proton P travels with a speed v , parallel to the wire , at a distance d from it in a direction opposite to the current as shown in the figure . What is the force experienced by the proton and what is its direction ?

The direction of force on a current carrying conductor in a magnetic field is given by

Derive an expression for the force between two long parallel current carrying conductors. Use this expression to define SI unit of current.

The force between two parallel current carrying wires is independent of

When is the force experienced by a current-carrying conductor placed in a magnetic field is largest?

Using the concept of force between two infinitely long parallel current carrying conductors, define one ampere of current.

The magnetic field in a straight current carrying conductor wire is:

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