Explanation Given data: Consider the field at the center of the heart is 90 pT, which is equal to 90 × 10 − 12 T . Consider the diameter of the heart is 12 cm. Hence, the radius of the heart is 12 cm 2 = 6 cm . Formula used: Consider the expression for magnetic field at the center of a loop. B = μ 0 I 2 R (1) Here, R is radius of the heart, μ 0 is permeability constant, which is generally known as 4 π × 10 − 7 T . m/A , and I is current. Explanation: The current needed to produce this field can be calculated from the expression of magnetic field at the center of a loop. Re-arrange equation (1) to find the current I . I = 2 B R μ 0 Substitute 4 π × 10 − 7 T ⋅ m A for μ 0 ¸ 90 × 10 −<

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ISBN: 8220106755235

Author: Field

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Magnetic Force

A magnetic force arises when a charged particle or a current-carrying conductor is placed in a magnetic field. It is created because of the movement of the charged particles.

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Chapter 24, Problem 19P

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To calculate: The amount of current circulates around the heart for producing this field.

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Chapter 24, Problem 18P

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Chapter 24 Solutions

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The amount of current circulates around the heart for producing this field.

Solution Summary: The author explains how the amount of current circulates around the heart can be calculated from the expression of magnetic field at the center of a loop.

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To calculate: The amount of current circulates around the heart for producing this field.

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Chapter 24 Solutions