Question

write ampere's observations
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Answer 1

Answer:

Ampere law supplements Biot-Savart law in providing relation between current and magnetic field. Biot-Savart law provides expression of magnetic field for a small current element. If we need to find magnetic field due to any extended conductor carrying current, then we are required to use techniques like integration and superposition principle. Ampere law is another law that relates magnetic field and current that produces it. This law provides some elegant and simple derivation of magnetic field where derivation using Biot-Savart law would be a difficult proposition. This advantage of Ampere law lies with the geometric symmetry, which is also its disadvantage. If the conductor or circuit lacks symmetry, then integration involving Ampere’s law is difficult.

Ampere law as modified by Maxwell for displacement current is one of four electromagnetic equations.

Answer 2

Lived 1775 – 1836.

André-Marie Ampère made the revolutionary discovery that a wire carrying electric current can attract or repel another wire next to it that's also carrying electric current. The attraction is magnetic, but no magnets are necessary for the effect to be seen