A uniform magnetic field of 2T is produced in a Cylinderical of free space having radius 5 cm. A conductor carrying a current `500mA` passes through the region intersecting the axis normally. What is the magnitude of the force acitng on the conductor?

A spherical conductor of radius 10 cm has a charge of 3.2×10 ^−7 C distributed uniformly. What is the magnitude of electric field at a point 15cm from the centre of the sphere?

A [He^(2+)] ion travels a velocity of 10^5 m/s at right angles to a magnetic field of 0.80 T. What is the magnitude of the magnetic force on the ion ?

A coil of 200 turns has a cross-sectional area 900 mm It carries a current of 2 ampere. The plane of the coil is perpendicular to the uniform magnetic field of 0.5T. Calculate : torque acting on the coil

The wire shown in the figure carries a current of 10A. What is the magnitude of magnetic field induction at the centre O? Give the radius of the bend coil is 3 cm.

A square coil of side 10cm consist of 20 turns and carries a current 10A. The coil is suspended vertically and normally and makes angle 30^@ with horizontal direction of uniform magnetic field 80T. What is the magnitude of torque experienced by the coil.

An infinitely long straight current carrying wire produces a magnetic field B at a point at a distance 'a' from it. What must be the radius of the circular loop, so that for the same current through it the magnetic field at (II) an axial point, distant equal to the radius of the loop equals B?