The number of turns in a solenoid is doubled, and at the same time its length is doubled. (a) Does themagnetic field within the solenoid increase, decrease, or stay thesame? (b) Choose the best explanation from among the following:I. Doubling the number of turns in a solenoid doubles its magnetic field, and hence the field increases.II. Making a solenoid longer decreases its magnetic field, andtherefore the field decreases.III. The magnetic field remains the same because the number ofturns per length is unchanged.

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ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
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Chapter1: Units, Trigonometry. And Vectors
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The number of turns in a solenoid is doubled, and at the same time its length is doubled. (a) Does the
magnetic field within the solenoid increase, decrease, or stay the
same? (b) Choose the best explanation from among the following:
I. Doubling the number of turns in a solenoid doubles its magnetic field, and hence the field increases.
II. Making a solenoid longer decreases its magnetic field, and
therefore the field decreases.
III. The magnetic field remains the same because the number of
turns per length is unchanged.

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