The Biot Savart.s Law in vector form is :

Ohm.s law in vector form is :

State Biot-Savart law.

Write Coulomb.s law in vector form.

(a) State Biot - Savart law and ecpress it in the vector form. (b) Using Biot - Savart law, law obtain the expression for the magnetic field due to a circular coil of radius r, carrying a current I at point on its axis distant x from the centre of the coil.

Answer the following: (a) State Biot - Savart's law and express this law in the vector form. (b) Two identical circular coils, P and Q each of radius R , carrying currents 1A and sqrt(3)A respectively, are placed concentrically and perpendicular to each other lying in the XY and YZ planes. Find the magnitude and direction of the net magnetic field at the centre of the coils.

A: Ampere circuital law is not independent of the Biot- Savart's law. R: Ampere's Circuital law can be derived from the Blot Savart law.

(i) State Biot-Savart.s law. (ii) Find magnetic flux density at a point on the axis of a long solenoid having 5000 turns m when it carrying a current of 2 A.

Biot Savart law of magnetism is analogous to:

(a) Using Ampere.s circuital law or Biot Savart.s law, show that magnetic flux density .B. at a point P at a perpendicular distance.d from a long current carrying conductor is given by: B=(mu_0/(4pi)) (2I)/a (Statement of the law is not required) (b) Define the terms (i) drift velocity, (ii) relaxation time. A conductor of length L is connected to a d.c. source of emf E. If this conductor is replaced by another conductor of same material and same area of cross-section but of length 3L, how will the drift velocity change?