A square coil of side 10 cm consists of 20 turns and carries a current of 12 A. The coil is suspended vertically and the normal to the plane of the coil makes an angle of 30° with the direction of a uniform horizontal magnetic field of magnitude 0.8 T. What is the magnitude of the torque experienced by the coil?

A circular coil of radius 2.0 cm has 500 turns in it and carries a current of 1.0 A . Its axis makes an angel of 30^@ with the uniform magnetic field of 0f magnitude 0.40 T that exists in the space. Find the torque acting on the total.

A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspend in mid-air by a uniform horizontal magnetic field B (Figure). What is the magnitude of the magnetic field ?

What is the magnanitude of magnetic force per unit length on a wire carrying a current of 8 A and making an angle of 30^(@) with the direction of a uniform magnetic field of 0.15 T ?

A cirular coil of wire cansiting of 100 turns ,each of readius 8.0 cm carries a current of 0.40 A. What is the magnitude of the magnetic field barB at the centre of the coil ?

A circular coil of radius 1*5 cm carries a current of 1*5A . If the coil has 25 turns , find the magnetic field .What is the value of M ?

A magnetised needle of magnetic moment 3.6 xx 10^(-2) T^(-1) is placed at 30^(@) with the direction of uniform magnetic field of magnitude 2 xx 10^(-2)T . Calculate the torque acting on the needle.

A circular coil of 30 turns and radius 8.0 cm carrying a current or 6.0 A is suspend vertically in a uniform horizontal magnetic field of lines make an angle of 60^@ with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning. b. Whould your answer change, if the circular coil in (a) were replaced by a plannar coil of some irregular shape that encloses the same area ? (All other particulars are also unaltered. )

Consider a tightly wound 100 turn coil of radius 10 cm, carrying a current of 1 A. What is the magnitude of the magnetic field at the centre of the coil?