A current (I) carrying circular wire of radius R is placed in a magnetic field B perpendicular to its plane. The tension T along the circumference of the wire is

A wire carrying current I is tied between points P and Q and is in the shape of a circular arc of radius R due to a uniform magnetic field B (perpendicular to the plane of the paper, shown by xxx) in the vicinity of the wire. If the wire subtends an angle 2theta_(0) at the centre of the circle (of which it forms an arc) then the tension in the wire is:

A wire carrying current I is tied between points P and Q and is in the shape of a circular arch of radius R due to a uniform magnetic field B (perpendicular to the plane of the paper, shown by cross marked) in the vicinity of the wire. If the wire subtends and angle 2 theta_(0) at the centre of the circle of which it forms an arch) then the tension in the wire is:

A circular loop of radius R carrying a current is placed in a uniform magnetic field with its plane perpendicular to B. The force on the loop is