Questions in Moving Charges and Magnetism

Select	Question
	If two streams of protons move parallel to each other in the same direction, then they
	A straight wire carrying a current ${i_1}\,amp$ runs along the axis of a circular current ${i_2}\,amp$. Then the force of interaction between the two current carrying conductors is
	Two parallel wires are carrying electric currents of equal magnitude and in the same direction. They exert
	Two long and parallel wires are at a distance of 0.1 m and a current of 5 A is flowing in each of these wires. The force per unit length due to these wires will be
	Two straight parallel wires, both carrying 10 ampere in the same direction attract each other with a force of $1 \times {10^{ - 3}}N$. If both currents are doubled, the force of attraction will be
	A circular coil of radius 4 cm has 50 turns. In this coil a current of 2 A is flowing. It is placed in a magnetic field of 0.1 $weber/{m^2}$ . The amount of work done in rotating it through $180^\circ $ from its equilibrium position will be
	3 A of current is flowing in a linear conductor having a length of 40 cm. The conductor is placed in a magnetic field of strength 500 gauss and makes an angle of $30^\circ $ with the direction of the field. It experiences a force of magnitude
	The radius of a circular loop is r and a current i is flowing in it. The equivalent magnetic moment will be
	A current carrying loop is placed in a uniform magnetic field. The torque acting on it does not depend upon
	To make the field radial in a moving coil galvanometer