Define the faraday's law and Lenz law
Answers
Explanation:
Faraday Law:
Any change in the magnetic environment of a coil of wire will cause a voltage (emf) to be "induced" in the coil. ... The induced emf in a coil is equal to the negative of the rate of change of magnetic flux times the number of turns in the coil. It involves the interaction of charge with magnetic field.
Lenz Law
Direction of the electric current which is induced in a conductor by a changing magnetic field is such that the magnetic field created by the induced current opposes the initial changing magnetic field
Answer:
Faraday's law, due to 19ᵗʰ century physicist Michael Faraday. This relates the rate of change of magnetic flux through a loop to the magnitude of the electro-motive force \mathcal{E}EE induced in the loop. The relationship is
\mathcal{E} = \frac{\mathrm{d}\Phi}{\mathrm{d}t}E=
dt
dΦ
E, equals, start fraction, d, \Phi, divided by, d, t, end fraction
The electromotive force or EMF refers to the potential difference across the unloaded loop (i.e. when the resistance in the circuit is high). In practice it is often sufficient to think of EMF as voltage since both voltage and EMF are measured using the same unit, the volt. Explain
Lenz's law is a consequence of conservation of energy applied to electromagnetic induction. It was formulated by Heinrich Lenz in 1833. While Faraday's law tells us the magnitude of the EMF produced, Lenz's law tells us the direction that current will flow. It states that the direction is always such that it will oppose the change in flux which produced it. This means that any magnetic field produced by an induced current will be in the opposite direction to the change in the original field.
Lenz's law is typically incorporated into Faraday's law with a minus sign, the inclusion of which allows the same coordinate system to be used for both the flux and EMF. The result is sometimes called the Faraday-Lenz law,
\mathcal{E} = -\frac{\mathrm{d}\Phi}{\mathrm{d}t}E=−
dt
dΦ
E, equals, minus, start fraction, d, \Phi, divided by, d, t, end fraction
In practice we often deal with magnetic induction in multiple coils of wire each of which contribute the same EMF. For this reason an additional term NNN representing the number of turns is often included, i.e.
\mathcal{E} = -N \frac{\mathrm{d}\Phi}{\mathrm{d}t}E=−N
dt
dΦ
E, equals, minus, N, start fraction, d, \Phi, divided by, d, t, end fraction
What is the connection between Faraday's law of induction and the magnetic force?
While the full theoretical underpinning of Faraday's law is quite complex, a conceptual understanding of the direct connection to the magnetic force on a charged particle is relatively straightforward.
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