A wire along the x-axis is placed in a magnetic field in the positive y- directi

Question

A wire along the x-axis is placed in a magnetic field in the positive y- direction. If the wire has a current in the positive x-direction, what direction is the force on the wire? 2) What is the direction of the magnetic field produced by a current carrying wire along the z-axis with the current flowing in the negative z direction? Assume you are looking down from the positive z direction toward the negative z direction. 3) A solenoid has a vertical axis (straight up and down on the z-axis). The current in the solenoid is clockwise looking down. What is the direction of the magnetic field looking down? 4) A closed path is perpendicular to and encloses two horizontal current carrying wires. One wire has a current of 2 A in the x-direction and one wire has a 2 A current in the negative x-direction. What is the net magnetic field of the two wires? 5)

Explanation / Answer

Fmag = i ( L x B )

2) current in the wire is along + x direction

direction of magnetic field is along + y direction

so magnetic force on the wire will be along + z direction

3) By right hand thumb tule we can say that the direction of magnetic field will be clock wise in x-y plane.

4) By right hand thumb tule we can say that the direction of magnetic field will be downward along -z direction.

5) net magnetic field will be zero because enclosed net current is zero.

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