A wire of magnetic moment $M$ is moulded according to figure, then magnetic moment becomes
  • A$\frac{\sqrt 2 M}{\pi}$
  • B$\frac{2 M}{\pi}$
  • C$\frac{2 \sqrt 2 M}{\pi}$
  • D$\frac{ M}{\pi}$
Medium
art

Download our app
and get started for free

Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*

Similar Questions

  • 1
    A current carrying rectangular loop PQRS is made of uniform wire. The length $PR = QS =5\,cm$ and $PQ = RS =100\,cm$. If ammeter current reading changes from I to $2 I$, the ratio of magnetic forces per unit length on the wire $P Q$ due to wire RS in the two cases respectively $f_{ PQ }^{ I }: f_{ PQ }^{2 I }$ is :
    View Solution
  • 2
    A rectangular loop of wire shown below is coplanar with a long wire carrying current $I$. The loop is pulled to the right a s indicated. What are the directions of the induced current in the loop and the magnetic forces on the left and the right sides of the loop?
      Induced current Force on left side Force on right side
    $a.$ Counter clockwise To the left To the right
    $b.$ clockwise To the left To the right
    $c.$ Counter clockwise To the right To the left
    $d.$ clockwise To the right To the left

    View Solution
  • 3
    A galvanometer having a resistance of $20\,\Omega $ and $30\, divisions$ on both sides has figure of merit $0.005\, ampere /division$. The resistance that should be connected in series such that it can be used as a voltmeter upto $15\, volt$ is ........... $\Omega$
    View Solution
  • 4
    Two particles $x$ and $y$ have equal charges and possessing equal kinetic energy enter in a uniform magnetic field and describe circular path of radius of curvature $r_1$ and $r_2$ respectively. The ratio of their masses is
    View Solution
  • 5
    A galvanometer of resistance $20 \,\Omega$ is to be converted into an ammeter of range $1\, A$. If a current of $1\, mA$ produces full scale deflection, the shunt required for the purpose is ................ $\Omega $
    View Solution
  • 6
    Two long straight conductors with currents $I_1$ and $I_2$ are placed along $X$ and $Y-$ axes. The equation of locus of points of zero magnetic induction is 
    View Solution
  • 7
    A current $i$ ampere flows in a circular arc of wire whose radius is $R$, which subtend an angle $3\pi /2$ radian at its centre. The magnetic induction at the centre is
    View Solution
  • 8
    The magnetic field at the centre of a wire loop formed by two semicircular wires of radii $R_1=2 \pi\  \mathrm{m}$ and $R_2=4 \pi\  \mathrm{m}$ carrying current $I=4 \mathrm{~A}$ as per figure given below is $\alpha \times 10^{-7} \mathrm{~T}$. The value of $\alpha$ is___________ (Centre $\mathrm{O}$ is common for all segments)
    View Solution
  • 9
    In a moving coil galvanometer, to make the field radial
    View Solution
  • 10
    A current $i$ ampere flows along the inner conductor of a coaxial cable and returns along the outer conductor of the cable, then the magnetic induction at any point outside the conductor at a distance $r$ metre from the axis is
    View Solution