the magnetic equivalent of ohm's law is ..
Today, one of our lecturers asked this question in classroom. It was - What is the magnetic equivalent of ohm's law? I am clueless about the answer to this. Can some CEan explain?
Replies
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silverscorpionOhm's law:
E = IR where E is the EMF, I is the current and R the resistance.
Magnetic Circuit Hopkinson.27S Law: The Magnetic Analogy To Ohm.27S Law
F = ΦR[sub]m[/sub] where F is the MMF, Φ is the magnetic flux and R[sub]m[/sub] the magnetic reluctance
Just as Ohm's law relates the EMF across an element in a circuit to the current flowing through that element, Hopkinson's law relates the MMF (MagnetoMotive Force) across a magnetic element in a circuit to the magnetic flux through that element. The constant corresponding to electrical resistance in Ohm's law, is magnetic reluctance in Hopkinson's law.. -
aarthivg
Actually this question was asked in an exam.silverscorpionOhm's law:
E = IR where E is the EMF, I is the current and R the resistance.
Magnetic Circuit Hopkinson.27S Law: The Magnetic Analogy To Ohm.27S Law
F = ΦR[sub]m[/sub] where F is the MMF, Φ is the magnetic flux and R[sub]m[/sub] the magnetic reluctance
Just as Ohm's law relates the EMF across an element in a circuit to the current flowing through that element, Hopkinson's law relates the MMF (MagnetoMotive Force) across a magnetic element in a circuit to the magnetic flux through that element. The constant corresponding to electrical resistance in Ohm's law, is magnetic reluctance in Hopkinson's law..
the options are
lens law
faradays law
rowlands law
maxwells law -
silverscorpion^^ Then the answer would be Rowland's law.. It seems Hopkinson's law is also called Rowland's law.
In that same Wiki page, there is an analogy of various elements in magnetic and electric circuits. Refer that..
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