A coil of one turn is made of a wire of certain length and then from the same length a coil of two turns is made. If the same current is passed is both the cases, then the ratio of the magnetic induction at their centers will be

A straight wire of length 0.5 m and carrying a current of 1.2 A is placed in uniform magnetic field of induction 2 T.  The magnetic field is perpendicular to the length of the wire. The  force on the wire is

A 10 eV electron is circulating in a plane at right angles to a uniform field of magnetic induction 10^-4 Wb/m² ( =1.0 gauss). The orbital radius of the electron is

Tesla is the unit of

A deutron of kinetic energy 50 keV is describing a circular orbit of radius 0.5 m in a plane perpendicular to magnetic field B.  The kinetic energy of the proton that describes a circular orbit of radius 0.5 m in the same plane with the same B is

A current carrying coil is subjected to a uniform magnetic field. The coil will orient so that its plane becomes 

A charge moving with velocity v in X-direction is subjected to a field of magnetic induction in negative X – direction . As a result, the charge will

At what distance from a long straight wire carrying a current of 12 A will the magnetic field be equal to 3 x 10^-5 Wb/m²?

Two equal electric currents are flowing perpendicular to each other as shown in the figure. AB and CD are perpendicular to each other and symmetrically placed with respect to the currents, where do we expect the resultant magnetic field to be zero?

A charged particle of charge q and mass m enters perpendicularly in a magnetic field  Kinetic energy of the particle is E, then frequency of rotation