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

Answer:

$r=2mm$

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

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