suppose an observer is moving parallel to the wire with velocity `v_d` such that electrons are at rest for observer the magnetic field produced by electrons at a distance of x from the wire is
a) `mu_0 I` / (2`pi`x)
b) `mu_0 I` / (2x)
c) Zero
d) Undeffected

A long straight wire carries an electric current of 2A . The magnetic induction at a perpendicular distance of 5m from the wire is ( mu_(0)4 pi xx 10^(7)Hm^(-1))

A long straight wire is carrying a current of 12 A . The magnetic field at a distance of 8 cm is (mu_(0) =4pi xx 10^(-7) N A ^(2))

A long wire in the shape of a cylindrical shell of inner and outer radii R/2 and R respectively carries a steady current I in a direction parallel to its length. This current is uniformly distributed across the area of cross-section of the wire. The magnetic field intensity at a point at a distance (3R)/4 from the axis of the wire is m((mu_(0)I)/(pi R)) .. The value of m is _________.

A rod of length l is kept parallel to a long wire carrying constant current i . It is moving away from the wire with a velocity v . Find the emf induced in the wire when its distance from the long wire is x .

Current I_1 and I_2 flow in the wires shown in Fig. The field is zero at distance x to the right of O. Then

The magnetic field at a distance r from a long wire carryimg current I is 0.4 T. The magnetic field at a distance 2r is

A rod of length l is placed perpendicular to a long wire carrying current i . The rod is moved parallel to the wire with a velocity v . Find the emf induced in the rod, if its nearest end is at a distance a from the wire.

A rod of length l is placed perpendicular to a long wire carrying current i . The rod is moved parallel to the wire with a velocity v . Find the emf induced in the rod, if its nearest end is at a distance a from the wire.

A cylindrical long wire of radius R carries a current I uniformly distributed over the cross sectional area of the wire. The magnetic field at a distance x from the surface inside the wire is

A rectangular loop is moving parallel to a long wire carrying current i with a velocity v . Find the emf induced in the loop (Fig. 3.68) if its nearest end is at a distance a from the wire. Draw equivalent electrical diagram.