Notes O Ask Your Teacher 13. -/10 peints SerCP7 19.P.037.soln. A cardiac pacemak

Question

Notes O Ask Your Teacher 13. -/10 peints SerCP7 19.P.037.soln. A cardiac pacemaker can be affected by a static magnetic field as small as 1.7 mT. How dlose can a pacemaker wearer come o to a long, straight wire carrying 22 A? My Notes Ask Your 14. .-12 points SerCP7 19.P03a. The two wires shown in Figure P19.38 carry currents of 5.00 A in opposite directions and are separated by 10.0 cm. Find the direction and magnitude of the net magnetic field at the following locations. 500 A Figure P19.38 (a) at a point midway between the wires (b) at point P1, 10.0 cm to the right of the wire on the right (c) at point P2, 20.0 cm to the left of the wire on the left

Explanation / Answer

Solution:-

The magnetic field of the wire B = I(?_0) / 2?d

Here ?_0 is the permeability constant 1.26 x 10^-6 Tm/A,

I = current through the wire,

d = perpendicular distance from the wire

B = I(?_0) / 2?d

dB = I(?_0) / 2?

d = I(?_0) / 2?B

d = (22 A)(1.26 x 10^-6 Tm/A) / 2?(1.7 x 10^-3 T)

d ? 2.59 x 10^-3 m = 2.59 mm

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