A loop carrying a clockwise current has a long straight wire with an upward curr

Question

A loop carrying a clockwise current has a long straight wire with an upward current passing through the middle of it as shown. 15. What is the direction of the magnetic force on the current in the long straight w ire due to the current in the loop? A) Left B) Right C) Into page D) Out of Page E) Zero 16. What is the direction of the magnetic force on the current in the segment h-c of the loop due to the current I_1 in the long straight wire? A) Left B) Right C) Into page D) Out of Page E) Zero 17. What is the direction of the net force on the loop due to the current in the long straight wire? A) Left B) Right C) Into page D) Out of Page E) Zero

Explanation / Answer

basing on ampere right hand rule : the current is alawys perpendicular magnetic field

(15) the current is moving is up wards the direction of force of magnetic field is out of page

(16) the current in segment b-c is down wards the direction of magnetic field is into the page

(17)the direction of the net force is zero

the above condition is basing on this condition

a straight conductor carrying current produces a magnetic field around it which is radially symmetric .the magnetic lines of force at any point gives the direction of magnetic field produced at that point by current carrying conductor the deflection of small compass needle around a straight conductor carrying current

if the wire is perpendicular to the plane of the paper with the current normally outwards then the magnetic field direction is as shown by the arrow similarly if the wire is perpendicular to the plane of paper with current normally in wards then direction of the magnetic field

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