Explanation 1) Concept: We use the equation of torque acting on a current loop. By using this equation and considering the maximum area of loop (as the maximum torque is given), we can calculate the current in a loop. 2) Formulae: i) τ = N i A B s i n θ ii) A = s i d e 2 3) Given: i) The maximum torque on the loop is τ = 4.80 × 10 - 8 N m ii) The maximum possible length of loop L = 4.0 cm = 0.04 m iii) Magnetic field, B = 0.040 T 4) Calculations: The maximum possible length of a loop is 0.04 cm. So, the length of wire will be approximately 0.08 cm. Now, the equation for a torque on a current loop is τ = N i A B s i n θ We can see that the torque on a current loop can be maximum when area of loop A is maximum. For the rectangular loop, the maximum area is obtained when it becomes a square. So, if we make the 8.0 cm wire in a square shape, the side of square will be s i d e = 1 4 × 0

10th Edition

ISBN: 9781118230732

Author: David Halliday

Publisher: WILEY

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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 28, Problem 52P

To determine

To find:

The current in a loop.

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Chapter 28, Problem 51P

Chapter 28, Problem 53P

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The current in a loop.

Solution Summary: The author explains the equation of torque acting on a current loop to calculate the current in the loop.

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To find: The current in a loop.

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Chapter 28 Solutions

To find:

The current in a loop.