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 17 A

Answer 1

`r=2mm`

Step-by-step 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

`r=((4\pi *10^(-7)T.m/A)(17A))/(2\pi (0.0017T))\\ r=2*10^(-3)m\\ r=2mm`