Please explain lens law

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Please explain lens law

Posted by Mukul Kumar 8 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Geeta Geeta 8 years, 6 months ago

Lenz's law , named after the <a href="https://en.wikipedia.org/wiki/Physicist" title="Physicist">physicist</a> <a href="https://en.wikipedia.org/wiki/Emil_Lenz" title="Emil Lenz">Emil Lenz</a> who formulated it in 1834 says:

The direction of current induced in a conductor by a changing <a href="https://en.wikipedia.org/wiki/Magnetic_field" title="Magnetic field">magnetic field</a> due to <a href="https://en.wikipedia.org/wiki/Faraday%27s_law_of_induction" title="Faraday's law of induction">Faraday's law of induction</a> will be such that it will create a magnetic field that opposes the change that produced it.

Lenz's law is shown by the negative sign in <a href="https://en.wikipedia.org/wiki/Faraday%27s_law_of_induction" title="Faraday's law of induction">Faraday's law of induction</a>:

</dd> </dl>

which indicates that the induced <a href="https://en.wikipedia.org/wiki/Electromotive_force" title="Electromotive force">EMF</a> and the change in <a href="https://en.wikipedia.org/wiki/Magnetic_flux" title="Magnetic flux">magnetic flux</a> have opposite signs.It is a qualitative law that specifies the direction of induced current but says nothing about its magnitude. Lenz's Law explains the direction of many effects in <a href="https://en.wikipedia.org/wiki/Electromagnetism" title="Electromagnetism">electromagnetism</a>, such as the direction of voltage induced in an <a href="https://en.wikipedia.org/wiki/Inductor" title="Inductor">inductor</a> or wire loop by a changing current,Lenz's law can be seen as analogous to <a href="https://en.wikipedia.org/wiki/Newton%27s_laws_of_motion#Newton.27s_third_law" title="Newton's laws of motion">Newton's third law</a>

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CBSE > Class 10 > Science