I need work, formulas, justifications, diagrams, and solutions to double check m

Question

I need work, formulas, justifications, diagrams, and solutions to double check myself

13. A cardiac pacemaker can be affected by a static magnetic field as small as 1.7 mI. How close can a pacemaker wearer come to a long, straight wire carrying 20 A? 14. On your own words, describe and explain how can you detenrine the polarty ot s bailoon after being rubbed apainst a person hair f aftcer doing so, the hair exterds towards the bailaon as it separates from the head who ubbed the baloon against thair hair

Explanation / Answer

given that

B = 1.7mT

current = I = 20A

Field due to st. wire at a distance r from it is

   B = 0 I/2r

    r = (4 * 10-7)*20A /(2) *(1.7*10-3T)

    r = (2* 10-7)*20A / (1.7*10-3T)

   r = 2.35mm

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