Two parallel straight wires are aligned with the x-axis, one 10 em above the x-a

Question

Two parallel straight wires are aligned with the x-axis, one 10 em above the x-axis and the other 20 cm below the x-axis. The currents in the wires are the same but oppositely directed with the upper current directed +x. What is the direction of the net magnetic field along the x-axis? A. to len B to right C. into page D, out of page E. to top of page F. to bottom of page What is the direction of the magnetic force acting on the lower wire? A. to left B to right C. into page D. out of page E. to top of page F. to bottom of page rotons enter into a uniform magnetic field as shown by the box at the right. Vhich path is followed by the protons within the box? Ans: B out of pags

Explanation / Answer

4) The magnetic field along the x axis due to the current in the lower wire(which carries the current in + x direction) is into the page.

The magnetic field along the x axis due the current in the lower wire (which carries the current in - x direction) is also into the page.

Hence the direction of the net magnetic field along the x axis is C) into the page

The currents are in opposite direction. The magnetic force on each wire will be repelling. Hence, the magnetic force on the lower wire is F. to the bottom of the page

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