(a) To determine The minimum possible magnitude of the magnetic field. Explanation Write the equation for the magnitude of the magnetic force on a straight wire carrying current. F = I L B sin θ Here, F is the magnitude of the magnetic force on a straight wire carrying current, I is the current through the wire, L is the length of the wire, B is the magnitude of the magnetic field and θ is the angle between the length of the wire and the magnetic field. Rewrite the above equation for B . B = F I L sin θ Here, B is minimum when the value of sin θ is maximum. The maximum value of sin θ occurs for θ = 90 ° . Substitute 90 ° for θ in the above equation. B min = F I L sin 90 ° = F I L (I) Here, B min is the minimum possible magnitude of the magnetic field. Conclusion: Given that the magnitude of the magnetic force on the wire is 4 (b) To determine The reason why the given information enables to calculate only the minimum possible filed magnitude.

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ISBN: 9781260487008

Author: GIAMBATTISTA, Alan

Publisher: MCGRAW-HILL HIGHER EDUCATION

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Chapter 19, Problem 46P

(a)

To determine

The minimum possible magnitude of the magnetic field.

(b)

To determine

The reason why the given information enables to calculate only the minimum possible filed magnitude.

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Chapter 19, Problem 45P

Chapter 19, Problem 47P

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