Each of two long straight parallel wires 13 cm apart carries a current of 150 A
ID: 2260244 • Letter: E
Question
Each of two long straight parallel wires 13 cm apart carries a current of 150 A. The figure shows a cross section, with the wires running perpendicular to the page and point P lying on the perpendicular bisector of the line between the wires. Find the magnitude and direction of the magnetic field at P when the current in the left-hand wire is out of the page and the current in the right-hand wire is also out of the page.
What is the magnitude of B?
What is the value of Bx?
What is the value of By?
What is the value of Bz?
Find the magnitude and direction of the magnetic field at P when the current in the left-hand wire is out of the page and the current in the right-hand wire is into the page.
What is the magnitude of B?
What is the value of Bx?
What is the value of By?
What is the value of Bz?
Explanation / Answer
Since the point P is on the perpendicular bisector of the line joining the wires. Angle subtended by point P from both the wires=450
Case 1:- When current in both wires are comming out of the paper.
Considering wire 1 only:-
Applying amperes law B*2?(d/?2)=?0I (d/?2 comes from symmetricity)
B = B(-cos45 y
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