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 17 A

Explanation:

Given data

B=1.7 mT

I=17A

To find

How close can a pacemaker wearer come to a long r=?

Solution

Use the equation B=(μ₀I)/2πr but instead of calculation B we will rearrange the equation to find r

So

B=(μ₀I)/2πr

r=(μ₀I)/2πB