A variable magnetic field creates a constant emf `E` in a conductor `ABCDA`. The resistances of portion `ABC, CDA` and `AMC` are `R_(1), R_(2)` and `R_(3)` repectively. What current will be shown by meter `M`? The magnetic field is concentrated near the axis of the circular conductor.

What is the relation between magnetic field (B), current (I) and distance (r) in case of a straight current-carrying conductor?

What will be magnetic field at centre of current carrying circular loop of radius R?

What will be magnetic field at centre of current carrying circular loop of radius R?

A uniform magnetic field B exists perpendicular to the plane of the Figure in a circular region of radius b with its centre at O. A cir- cular conductor of radius a ( lt b) and centre at O is made by join- ing two semicircular wires ABC and ADC. The two segments have same cross section but different resistances R_(1) and R_(2) respectively. The magnetic field in increased with time and there is an induced current in the conductor. (a) Find the ratio of electric fields inside the conductors ABC and ADC. (b) Explain why the electric field in two conductors is different despite the fact that the magnetic field is symmetrical.

The graph showing the variation of the magnetic field strength (B) with distance (r) from a long current carrying conductor is.

The magnetic field at a distance 1 m from a long straight conductor is 10^(-7)T . What is the current through the conductor?

Magnetic field at a distance r from an infinitely long straight conductor carrying a steady current varies as

Magnetic field at a distance r from an infinitely long straight conductor carrying a steady current varies as