11. Two ifraely long straight wees are perpendai\" to each 0eer?the planeofthe p

Question

11. Two ifraely long straight wees are perpendai" to each 0eer?the planeofthe page, earn ng equal currents in the directions shown. Determination the orientation of the net magnetic feld at a point in the 1" quadrant at a point (-y) of (10em, 10 cm) a. Zero b. Into the page c. Out of the page d. 45" up and to the right e 45" down and to the left 12. A circular loop of wire is positioned halt in and half out of a square region of uniform magnetic feld B directed into the page, as shown. In onder to (immediately) induce a couter-clockwise current in this loop, which way should the loop move? loop x xX X X (a) in the *x direction (b) in the "y direction (c) in the -y direction (d) in the -x direction

Explanation / Answer

11) (b) into the page

The direction of magnetic field due to a current carrying wire is determined by the right hand curl rule.

With the thumb pointing in the direction of current, the direction of the curl of the fingers give the direction of field.

In the figure, magnetic field due to both I1 and I2 is into the page.

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