Two wires $A$ and $B$ are carrying currents $I_1$ and $I_2$ as shown in the figure. The separation between them is $d$. A third wire $C$ carrying a current $I$ is to be kept parallel to them at a distance $x$ from $A$ such that the net force acting on it is zero. The possible values of $x$ are
$x = \left( {\frac{{{I_1}}}{{{I_1} - {I_2}}}} \right)d$ and $\,x = \frac{{{I_2}}}{{\left( {{I_1} + {I_2}} \right)}}d$
$\,\,x = \pm \frac{{{I_1}d}}{{\left( {{I_1} - {I_2}} \right)}}$
$x = \left( {\frac{{{I_2}}}{{{I_1} + {I_2}}}} \right)d$ and $\,x = \frac{{{I_2}}}{{\left( {{I_1} - {I_2}} \right)}}d$
$x = \left( {\frac{{{I_1}}}{{{I_1} + {I_2}}}} \right)d$ and $\,x = \frac{{{I_2}}}{{\left( {{I_1} - {I_2}} \right)}}d$
A current carrying closed loop in the form of a right angle isosceles triangle $ABC$ is placed in a uniform magnetic field acting along $AB.$ If the magnetic force on the arm $BC$ is $\vec F,$ the force on the arm $AC$ is
A thin flexible wire of length $\mathrm{L}$ is connected to two adjacent fixed points and carries a current $\mathrm{I}$ in the clockwise direction, as shown in the figure. When the system is put in a uniform magnetic field of strength $B$ going into the plane of the paper, the wire takes the shape of a circle. The tension in the wire is
A straight conductor carries a current of $5A$. An electron travelling with a speed of $5 \times {10^6}\,m{s^{ - 1}}$ parallel to the wire at a distance of $0.1\,m$ from the conductor, experiences a force of
Suppose an isolated north pole is kept at the centre of a circular loop carrying a electric current $i$. The magnetic field due to the north pole at a point on the periphery of the wire is $B$. The radius of the loop is $a$. The force on the wire is
A wire carrying current $I$ is tied between points $P$ and $Q$ and is in the shape of a circular arc of radius $R$ due to a uniform magnetic field $B$ (perpendicular to the plane of the paper, shown by $\times \times \times $) in the vicinity of the wire. If the wire subtends an angle $2\theta_0$ at the centre of the circle (of which it forms an arc) then the tension in the wire is