# A current A flows in a ring of radius cm made of a very thin wire. The tensile strength of the wire is equal to N. The ring is placed in a magnetic field, which is perpendicular to the plane of the ring so that the forces tend to break the ring. Find (in T) at which the ring is broken

## Question ID - 153950 :- A current A flows in a ring of radius cm made of a very thin wire. The tensile strength of the wire is equal to N. The ring is placed in a magnetic field, which is perpendicular to the plane of the ring so that the forces tend to break the ring. Find (in T) at which the ring is broken

3537

(1)

For the equilibrium of a small part of semicircular arc subtending angle of at the centre, or,  T

Next Question :

Two circular coils and , having equal number of turns and carrying currents in the same sense, subtend same solid angle at point . If the smaller coil is midway between and and if we represent the magnetic induction due to bigger coil at as and that due to smaller coil at as , then find the ratio   