Question

Collect information about the generation of current by using Faraday's law.

Answer 1

Hint: Faradays' law is based on the principle of electromagnetic induction. When there is a change in magnetic flux linked with the coil, an induced e.m.f is set up in the coil, and it increases with an amount of the current, area, and speed with which the coil is moving. This law gives the magnitude of induced e.m.f but not gives information about polarity. Many experiments and devices are working based on these laws.

Complete step by step answer:
i) Lenz’s law: According to Lenz’s law, the polarity of induced e.m.f is such that it opposes the cause which produces it.
i.e. $\varepsilon = - {\rm{N}}\dfrac{{{\rm{d}}\phi }}{{{\rm{dt}}}}$
Negative signs show that the induced e.m.f opposes the change in magnetic flux. It was explained by Lenz'. Lenz’s law is following the law of conservation of energy.
ii) A.C dynamo or Generator: It is work on the principle of electromagnetic induction which is explained by the Faraday's. An electric machine used to convert mechanical energy into electrical energy is known as A.C generator. When a coil is rotated in a uniform, magnetic field, an induced e.m.f is produced in it.
iii) Transformers: A transformer is an electrical device used to convert low alternating voltage at higher current into a high alternating voltage at lower current and vice versa. It works on the principle of mutual induction, which works according to Faraday's law of electromagnetic induction. An e.m.f is set up in a coil when a changing current flows through its nearby coil. Transformer mainly used for the A.C supply.

Note:
Eddy currents are generated by electromagnetic induction (explained by Faraday's law) circulate the coils core or any connecting metallic components inside the magnetic field because the magnetic flux is acting as a single loop of wire. Also, the electromagnetic induction furnace applications based on the heating effect of eddy current.