An electruc field of `300V//m` is confined to a circular area `10 cm` in diameter. If the field is increasing at the rate of `20V//m-s`, the magnitude of magnetic field at a point `15cm` from the centre of the circle will be-

An electric field of 300V/m is confined to a circular area 10cm in diameter.If the field is increasing at the rate of 20V/m-s and if the magnitude of magnetic field at a point 15cm from the centre of the circle is B *10^(-18)T find value of B

A circular loop of radius 9.7 cm carries a current 2.3 A. Obtain the magnitude of the magnetic field at the centre of the loop .

A bar magnet is 0.10 m long and its pole strength is 120 Am . Find magnitude of magnetic field at a point on its axis at a distance 20 cm from it .

A circular coil of 300 turns and diameter 14cm carries a current of 15A . What is the magnitude of magnetic moment linked with the loop?

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

At a point 20 cm from the centre of a uniformly charged dielectric sphere of radius 10 cm , the electric field is 100 V//m . The electric field at 3 cm from the centre of the sphere will be

A long straight wire carrying current I is bent into the shape as shown in the figure. The circular portion of the wire has radius (10//pi)m . The centre of this circle is at a distance 1m from the straight portion of the wire. What is the magnitude of the magnetic field at the centre of the circular portion? Given pi^2=10 .

A with of length 50 cm moves with a velocity of 300 m/min, perpendicular to a magnetic fiel. If the emf induced in the wire is 2 V, then the magnitude of the field in tesla is