Question

define magnetic field?​

Answer 1

Answer:

A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. ... Magnetic fields surround magnetized materials, and are created by electric currents such as those used in electromagnets, and by electric fields varying in time.

Explanation:

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Answer 2

Answer:

Internal Trade also known as Domestic Trade is the buying and selling of goods and services within the confines of the international boundaries of a nation. So while import and export are important for the economy of a nation, most of its GDP contribution comes from internal tradeAn inherently safe plant11, 12 relies on chemistry and physics to prevent accidents rather than on control systems, interlocks, redundancy, and special operating procedures to prevent accidents. Inherently safer plants are tolerant of errors and are often the most cost effective. A process that does not require complex safety interlocks and elaborate procedures is simpler, easier to operate, and more reliable. Smaller equipment, operated at less severe temperatures and pressures, has lower capital and operating costs.

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