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When an iron rod becomes magnetic?

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Anil Kumar G.
Anil Kumar G.Lv10
25 Sep 2020
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

An iron rod becomes magnetic when __________.

A) its atoms are aligned having plus charges on one side and negative charges on the other

B) positive ions accumulate at one end and negative ions at the other end

C) the net spins of electrons belonging to the atoms that form a domain are in the same direction

D) its electrons stop moving and point in the same direction.

an iron rod becomes magnetic when
A) it"s atoms are aligned having plus charges on one side andnegative charges on the other
B) positive iions accumulate at one end and negative ions at theother end
C) the net spins of electrons belonging to the atoms that form adomain are in the same direction
D)its electrons stop moving and point in the same direction

Faraday's law describes how electric fields and electromotive forces are generated from changing magnetic fields. This problem is a prototypical example in which an increasing magnetic flux generates a finite line integral of the electric field around a closed loop that surrounds the changing magnetic flux through a surface bounded by that loop. A cylindrical iron rod with cross-sectional area is oriented with its symmetry axis coincident with the z axis of a cylindrical coordinate system as shown. It has a uniform magnetic field inside that varies according to  .

uploaded image

1. Find  , the electromotive force (EMF) around a loop that is at distance R from the z axis, where R is restricted to the region outside the iron rod as shown. Take the direction shown in the figure as positive

2. Due to the cylindrical symmetry of this problem, the induced electric field   can depend only on the distance R from the z axis, where R is restricted to the region outside the iron rod. Find this field

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