Download App
Find magnetic field at point $P$ in given diagram.
  • A$\frac{{{\mu _0}i}}{{4\pi a}}\left( {\sqrt 3  - 1} \right) \odot $
  • B$\frac{{{\mu _0}i}}{{8\pi a}}\left( 1  - {\sqrt 3 } \right) \odot $
  • C$\frac{{{\mu _0}i}}{{8\pi a}}\left( {\sqrt 3  - 1} \right) \odot $
  • D$\frac{{{\mu _0}i}}{{4\pi a}}\left( 1  - {\sqrt 3 } \right) \odot $
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.*
Download App

Similar Questions

  • 1
    A tightly wound $100$ turns coil of radius $10 \mathrm{~cm}$ carries a current of $7 \mathrm{~A}$. The magnitude of the magnetic field at the centre of the coil is (Take permeability of free space as $4 \pi \times 10^{-7} \mathrm{SI}$ units):
    View Solution
  • 2
    A vertical wire carrying a current in the upward direction is placed in horizontal magnetic field directed towards north. The wire will experience a force directed towards
    View Solution
  • 3
    Two long wires are hanging freely. They are joined first in parallel and then in series and then are connected with a battery. In both cases, which type of force acts between the two wires
    View Solution
  • 4
    An electron having a charge e moves with a velocity $v$ in positive $x$ direction. A magnetic field acts on it in positive $y$ direction. The force on the electron acts in (where outward direction is taken as positive $z$-axis).
    View Solution
  • 5
    A proton and an $\alpha$ -particle, having kinetic energies $K _{ p }$ and $K _{\alpha},$ respectively, enter into $a$ magnetic field at right angles.

    The ratio of the radii of trajectory of proton to that of $\alpha$ -particle is $2: 1 .$ The ratio of $K _{ p }: K _{\alpha}$ is :

    View Solution
  • 6
    $A$ microammeter has a resistance of $100\,\Omega$ and $a$ full scale range of $50\,\mu$ $A$. It can be used as a voltmeter or a higher range ammeter provided a resistance is added to it. Pick the correct range and resistance combination $(s)$.
    View Solution
  • 7
    The fractional change in the magnetic field intensity at a distance $'r'$ from centre on the axis of current carrying coil of radius $'a'$ to the magnetic field intensity at the centre of the same coil is : (Take $r << a )$
    View Solution
  • 8
    A uniform wire is bent in the form of a circle of radius $R$. A current $I$ enters at $A$ and leaves at $C$ as shown in the figure :If the length $ABC$ is half of the length $ADC,$ the magnetic field at the centre $O$ will be
    View Solution
  • 9
    A long straight wire in the horizontal plane carries a current of $50\, A$ in north to south direction. Give the magnitude and direction of $B$ at a point $2.5\,m$ east of the wire
    View Solution
  • 10
    The magnetic field intensity at the point $O$ of a loop with current $i$, whose shape is illustrated below is
    View Solution