Using Ampere 's circuital law or Biot- Savart's a law, show that magnetic flux density B at point P at a perpendicular distance a from a long current carrying conductor is given by `B=(mu/(4 pi))(2I)/(a)` [ Statement of the laws not required]

(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?

Using Ampere.s circuital law, obtain an expression for the magnetic flux density .B. at a point .X. at a perpendicular distance .r. from a long current carrying conductor. (Statement of the law is not required).

The magnetic flux density at a point distant d from a long straight current carrying conductor is B, then its value at distance d/2 will be-

Which of the following figure shown the magnetic flux denstiy b at a distance r from a long straight rod carrying a steady current I ?

(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.

Which one of the following graphs shows the variation of magnetic induction B which distance r from a long wire carrying a current ?

Using Ampere's circuital law, obtain an expression for the magnetic field along the axis of a current carrying solenoid of length l and having N number of turns.

The strength of the magnetic field at a point r near a long straight current carrying wire is B . The field at a distance r/2 will be

The strength of the magnetic field at a point r near a long straight current carrying wire is B . The field at a distance r/2 will be

Write Biot-Savart law. Write the path of motion of an electron when it enters in magnetic field at (a) perpendicular (b) an angle theta .