The Biot Savart’s Law in vector form is:

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B.

State the SI unit of magnetic dipole moment.

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 througn X? Write your answer in terms of . 

 

(ii) Define ampere, in terms of froce between two current carrying conductors. 

When a charged particle is projected perpendicular to a uniform magnetic field, it describes a circular path in which:

• its speed remains constant 
• its velocity remains constant.
• its velocity remains constant.
• its kinetic energy increases.