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How is the magnetic field strength defined?

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How is the magnetic field strength defined?

(a) Wb m^-2

(b) A m^2

(c) A m^-2

(d) H m^-1

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This key question is from Ferro, Para and Dia Magnetic Materials topic in portion Magnetic & Insulating Materials of Engineering Material & Metallurgy

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Right option is (c) A m^-2

Best explanation: The strength of a magnetic field produced as a result of moving charges and dipoles is known as magnetic field strength (H). Mathematically, it is denoted by  with its SI units given in ampere per meter (A m-1).

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