(a) By how many percent is the torque of a motor decreased if its permanent magnets lose 5.0% of their strength?(b) How many percent would the current need to be increased to return the torque to original values?

(a) By how many percent is the torque of a motor decreased if its permanent magnets lose 5.0% of their strength?(b) How many percent would the current need to be increased to return the torque to original values?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 51P: If a current is 2.0 A, bow many turns per centimeter must be wound on a solenoid in order to produce...

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Concept explainers

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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(a) By how many percent is the torque of a motor decreased if its permanent magnets lose 5.0% of their strength?
(b) How many percent would the current need to be increased to return the torque to original values?

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