Physics (urgent please)

Two parallel wires are carrying 5A and are separated by 2.0 m. if the currents are in opposite directions, what is the magnitude of the magnetic field halfway between them?

Someone please help as I can't figure out the question.
Thanks,

They are asking for the field between the wires, not the force.

Because of symmetry, the magnetic field due to each wire will be equal and in the same direction at any point midway between them. (If the currents were parallel, the fields would cancel there and the net would be zero). Just double the field due to one wire. That gives you
B = 2 * muo * I/(2 pi R)
where R = 1.0 m, a muo is the peremeability of free space.

  1. 👍 0
  2. 👎 0
  3. 👁 83

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    Two parallel wires are carrying current. If the currents are in the same direction, what is the interaction between the two wires and why? How would this be different in the currents were in opposite directions?

    asked by Liz on July 9, 2014
  2. Phys 2425

    Two parallel wires, separated by the distance of 2 cm, carry the currents I1 = 1 A and I2 = 2 A in the same direction. How far from the wire carrying the current I1 is the magnetic field zero? I am wondering if the answer might be

    asked by A on March 18, 2016
  3. College Physics

    Two long, parallel wires separated by 50 cm each carry currents of 3.0 A in a horizontal direction. Find the magnetic field midway between the wires if the currents are in the same direction. B= T Find if they are in opposite

    asked by Lanise on February 19, 2010
  4. physics

    Two long parallel wires carry currents of 10 A in opposite directions. they are separated by 40 cm. what is the magnetic field in the plane of the wires that is 20 cm from one wire and 60 cm from the other?

    asked by manisha on May 24, 2010
  5. Physics

    Two parallel wires separated by 16 cm are carrying currents of 14 A (left) and 20A (right) in the same direction (up the page). Determine the magnetic field at position 3 cm to the right of the 20A wire. Calculate the distance

    asked by Gunner on May 19, 2017
  6. physics

    Two parallel wires in a horizontal plane carry currents I1 and I2 to the right. The wires each have a length L and are separated by a distance d. calculate the following where: I1 = 10A, I2 = 20A, d = 5mm, and L = 2m. What are the

    asked by Anonymous on October 14, 2010
  7. PHYSISC

    Two parallel, straight wires that are very long are separated by a distance of 0.065 m and carry currents of I1 =15 A and I2 =7.0A. Find the magnitude and direction of the force that the magnetic field of wire 1 applies to a 1.5-m

    asked by KAIT on September 3, 2011
  8. GENERAL PHYSICS

    Two long, parallel wires separated by 90 each carry currents of 2.0 in a horizontal direction.

    asked by shamille on November 15, 2009
  9. physics

    The figure below shows two current carrying wires and the directions of the currents they carry. The wires carry the following currents: I1 = 12.5 A and I2 = 9.8 A. Wire 1 is at (0, 4.0) mm; wire 2 is at (13.3, 0) mm; point P is

    asked by k on April 10, 2013
  10. Physics

    Two long parallel wires separated by a distance, d, carry currents in opposite directions. If the left-hand wire carries a current i/2, and the right-hand wires carries a current i, determine where the magnetic field is zero.

    asked by Jessica on October 20, 2011

More Similar Questions