Which one of the following is NOT a unit of magnetic field strength?

[amp_mcq option1=”Tesla” option2=”Gauss” option3=”Ampere – metre” option4=”Ampere/metre” correct=”option3″]

This question was previously asked in

UPSC Geoscientist – 2020

Ampere – metre (A·m) is NOT a unit of magnetic field strength.

Magnetic field strength can refer to magnetic flux density (B), measured in Tesla (T) or Gauss (G), or magnetic field intensity (H), measured in Amperes per metre (A/m). Ampere – metre (A·m) is the unit for magnetic dipole moment.

Tesla (T) is the SI unit for magnetic flux density (B). Gauss (G) is the CGS unit for magnetic flux density (1 T = 10^4 G). Ampere/metre (A/m) is the SI unit for magnetic field intensity (H). Magnetic field strength (H) and magnetic flux density (B) are related by the magnetic permeability of the medium ($B = \mu H$). Magnetic dipole moment (m) is a measure of the magnetic strength and orientation of a magnet or magnetic source.

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