Question

A cardiac pacemaker can be affected by a static magnetic field as small as 1.7 mT. How close can a pacemaker wearer come to a long, straight wire carrying 25 A

Answer 1

The distance is 2.94 mm.

Step-by-step explanation:

Magnetic field, B = 1.7 mT

Current, I = 25 A

Let the distance is d.

The magnetic field is given by

`B = (\mu o)/(4\pi)* (2I)/(r)\\\\1.7* 10^(-3) = 10^(-7)* (2* 25)/(r)\\\\r = 2.94* 10^(-3) m \\\\ r = 2.94 mm`