Find the direction of magnetic field at ...

Find the direction of magnetic field at a point P due to two infinite current carrying wires shown in the figure. Given `r_(1) gt r_(2)`

Text Solution

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Magnetic field at point P due to wire A is into the plane and due to wire B is out of the plane. As point P is closer to wire B its magnetic field will dominate. Hence magnetic field at point P is out of the plane

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The resulting magnetic field at the point O due to the current carrying wire shown in the figure:

Points out of the page

points into the page

is zero

is the same as due to the segment WX along.

The direction of magnetic field at a point due to an infinitely long wire carrying current is

parallel to the current

antiparallel to the current

along the perpendicular drawn from a point on the wire

perpendicular to the plane containing the conductor and the point

The magnetic field at a point P due to a current carrying coil as shown in figure is

`(mu_(0))/(4pi) (1)/(a^(2))`

`(mu_(0))/(4pi) (lax)/((x^(2)-a^(2))^(2))`

`(mu_(0))/(4pi) (2pila^(2))/(x^(2))`

`(mu_(0))/(4pi) (2pila^(2))/((x^(2)+a^(2))^(3"/"2))`