As shown in the figure, a current of $2\,A$ flowing in an equilateral triangle of side $4 \sqrt{3}\,cm$. The magnetic field at the centroid $O$ of the triangle is:

(Neglect the effect of earth's magnetic field.)

  • A$4 \sqrt{3} \times 10^{-4} \,T$
  • B$4 \sqrt{3} \times 10^{-5} \,T$
  • C$\sqrt{3} \times 10^{-4}\, T$
  • D$3 \sqrt{3} \times 10^{-5}\,T$
JEE MAIN 2023, 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
    Identical currents flow in two perpendicular wires, as shown in the figure. The wires are very close but do not touch. The magnetic field can be zero:
    View Solution
  • 2
    the magnetic induction at $O$ due to the whole length of the conductor is
    View Solution
  • 3
    For a solenoid keeping the turn density constant its length is halved and its cross section radius is doubled then the inductance of the solenoid increased by.....$\%$
    View Solution
  • 4
    A long solenoid has a radius $a$ and number of turns per unit length is $n$. If it carries a current $i$, then the magnetic field on its axis is directly proportional to
    View Solution
  • 5
    A charge particle projected with velocity $\vec v$ in uniform magnetic field ' $\vec B$ ' then for maximum magnetic force on it, which is correct
    View Solution
  • 6
    The flux density obtained at the centre of a circular coil of radius $R$ which carries a current $i$, is $B_0$. At a distance $‘pR’$ from the centre on the axis, the flux density will be
    View Solution
  • 7
    $PQ$ and $RS$ are long parallel conductors separated by certain distance. $M$ is the mid-point between them (see the figure). The net magnetic field at $M$ is $B$ . Now, the current $2\,A$ is switched off. The field at $M$ now becomes
    View Solution
  • 8
    Two parallel conductors $A$ and $B$ of equal lengths carry currents $I$ and $10\, I$, respectively, in the same direction. Then
    View Solution
  • 9
    In a galvanometer, the deflection becomes one half when the galvanometer is shunted by a $20\,\,\Omega$ resistor. The galvanometer resistance is ............... $\Omega$
    View Solution
  • 10
    A loop is moulded by a constant length current carrying wire and placed in external magnetic field, then torque acts on it does not depends upon

    $(a)$ Shape of loop

    $(b)$ Area of loop.

    $(c)$ Current in loop

    $(d)$ External magnetic field.

     

    View Solution