$AB$ and $CD$ are long straight conductor, distance $d$ apart, carrying a current $I$. The magnetic field at the midpoint of $BC$ is
  • A$\frac{{ - {\mu _0}I}}{{2\pi d}}\hat k$
  • B$\frac{{ - {\mu _0}I}}{{\pi d}}\hat k$
  • C$\frac{{ - {\mu _0}I}}{{4\pi d}}\hat k$
  • D$\frac{{ - {\mu _0}I}}{{8\pi d}}\hat k$
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 long solenoid has $200$ $turns$ per $cm$ and carries a current $i$. The magnetic field at its centre is $6.28 \times  10^{-2} $ $\frac{{Wb}}{{{m^2}}}$ Another long solenoid has $100$ $turns$ per $cm$ and it carries a current  $\frac{I}{3}\;$ . The value of the magnetic field at its centre is
    View Solution
  • 2
    An electron (mass $= 9 \times 10^{-31}\,kg$. Charge $= 1.6 \times 10^{-19}\,C$) whose kinetic energy is $7.2 \times 10^{-18}$ $joule$ is moving in a circular orbit in a magnetic field of $9 \times 10^{-5} \,weber/m^2$. The radius of the orbit is.....$cm$
    View Solution
  • 3
    A current $i$ is flowing in a straight conductor of length $L.$ The magnetic induction at a point on its axis at a distance $\frac {L}{4}$ from its centre will be
    View Solution
  • 4
    Infinite number of straight wires each carrying current $I$ are equally placed as shown in the figure. Adjacent wires have current in opposite direction. Net magnetic field at point $P$ is
    View Solution
  • 5
    The circular coil of a galvanometer has fifty turns. The coil has a radius of $1\ cm$. The coil is placed in a radial magnetic field of $0. 010\ T$. The torsion coefficent of the spring on which the coil hangs is $3 \times 10^{-7}\ N-m-rad^{-1}$. Determine the deviation of the galvanometer's hand if the current through the coil is $1.0\ mA$......$^o$
    View Solution
  • 6
    If two protons are moving with speed $v=4.5 \times 10^{5} \,m / s$ parallel to each other then the ratio of electrostatic and magnetic force between them
    View Solution
  • 7
    If the direction of the initial velocity of the charged particle is perpendicular to the magnetic field, then the orbit will be   or  The path executed by a charged particle whose motion is perpendicular to magnetic field is
    View Solution
  • 8
    A long straight wire of circular cross-section (radius $a$) is carrying steady current $I$. The current $I$ is uniformly distributed across this cross-section. The magnetic field is
    View Solution
  • 9
    A uniform current carrying ring of mass $m$ and radius $R$ is connected by a massless string as shown. A uniform magnetic field $B_0$ exist in the region to keep the ring in horizontal position, then the current in the ring is  ($l =$ length of string)
    View Solution
  • 10
    A current carrying wire $LN$ is bent in the from shown below. If wire carries a current of $10\, A$ and it is placed in a magnetic field of $5\,T$ which acts perpendicular to the paper outwards then it will experience a force.........$N$
    View Solution