1) i) Two insulated long, straight wires cross each other at right angle, and ea
ID: 1430991 • Letter: 1
Question
1) i) Two insulated long, straight wires cross each other at right angle, and each carries the same current I. Which of the following statements is true regarding the total magnetic field due to the two wires at the various points in the figure below? All points are equal distance to the wires. More than one statement may be correct.
a) The field is strongest at points B and D.
b) The field is strongest at points A and C.
c) The field is out of the page at point C and into the page at point A.
d) The field is out of the page at point B and out of the page at point D.e) The field has the same magnitude at all four points.
ii) Describe the magnetic force each apply to one another.
Explanation / Answer
Magnetic Field at a point due to current carrying long conductor is dependent only on the distance from the wire, and for same distance let the field be B
Total field at A = 2B inside the paper
Total Field at B = 0
Total Field at C = 2B outside the paper
Total Field at D = 0
a) False
b) True
c) True
d) False
e) False
2. Both apply equal and opposite force on each other which would cancel out because of the symmety of the problem
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