An electromagnet has 500 turns. When a current of 1 A passes through it, it can lift a ferromagnetic object with a force of 15 N. What happens to the force if: a) the number of turns decreases to 200 but that the wire length remains the same? b) the current increases by a factor of 4? c) the current decreases by a factor of 1.5 and the number of turns increases to 750 without changing the wire length?

An electromagnet has 500 turns. When a current of 1 A passes through it, it can lift a ferromagnetic object with a force of 15 N. What happens to the force if: a) the number of turns decreases to 200 but that the wire length remains the same? b) the current increases by a factor of 4? c) the current decreases by a factor of 1.5 and the number of turns increases to 750 without changing the wire length?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 69P

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