An Electric charge in a uniform motion produces

Two parallel wires carry current in the same direction attract each other because of

The strength of the magnetic field around a straight conductor carrying an electric current

A wire is parallel to the lines of the force of the magnetic field and the current flows in the wire. Then

A length of the wire carries a steady current. It is bent first to form a circular plane coil of one turn .The same length is now bent more sharply to give a double loop of the smaller radius .The magnetic field at the center caused by the same current is

Through two parallel wires A & B , 10 and 2 ampere of the currents are passed respectively in opposite direction. If the wire A is infinitely long and the length of the wire B is 2m. the force on the conductor B which is situated at 10 cm distance from A will be

An electron having a charge e moves with a velocity v in the x -direction. An electric field acts on it in y- direction. The force on the electron acts in

The resulting magnetic field at the point O due to the current carrying wire shown in the figure

A semicircular wire of radius r , carrying a current I, is placed in a magnetic field of the magnitude B .The force acting on it

A experimenter investigates the variation of the force F between the long , parallel current carrying conductors a distance d apart .A straight –line graph should be obtained on plotting