Question

what is ampere's circuital law..?

Answer 1

In classic electromagnetism , the Ampere's law can be expressed as relates the integrated magnetic field around a closed loop to the electric current passing through the loop.
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Answer 2

Answer:  The ampere (SI unit symbol: A; SI dimension symbol: I), often shortened to Amp, is the SI unit of electric current (quantity symbol: I,i) and is one of the seven SI base units. It is named after André-Marie Ampère (1775–1836), a French mathematician and physicist, considered the father of electrodynamics.