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...r potential''. A very well-known example of a divergence-free field is a [[magnetic induction|magnetic field]] '''B''', which is divergence-free by virtue of one of [[

...are referred to as "magnetic field". Therefore '''B''' is often called [[magnetic induction]] or magnetic flux density.</ref> The Dutch physicist [[Hendrik Antoon Lore <tr><td>* <small>''[[Faraday's law]] (voltage generated by change in magnetic induction)''</small>

...lows from the [[Biot-Savart's law|Biot-Savart-Laplace]] expression for the magnetic induction '''B'''('''r'''₁) due to a segment of the second loop. Insertio

{{Image|Motor.PNG|right|200px|Electric motor using a current loop in a [[magnetic induction|magnetic flux density]], labeled '''''B'''''}}

...ced an electric field (it is this field which causes the current to flow). Magnetic induction is of extreme importance in modern industrial society, because it is the pr

...ced an electric field (it is this field which causes the current to flow). Magnetic induction is of extreme importance in modern industrial society, because it is the pr

where '''E''' is the [[electric field]] and '''B''' is [[magnetic induction]] (also known magnetic flux density). The quantity ''c'' is the [[speed of

| [[Magnetic flux density]], [[magnetic induction]]

==[[Magnetic induction|Magnetic field (a.k.a. magnetic flux density)]]==