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IEVref: | 102-03-40 | ID: | |

Language: | en | Status: Standard | |

Term: | tensor quantity | ||

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Definition: | quantity $Q$ which can be represented by a tensor of the second order $T$ multiplied by a scalar quantity q$Q=qT$ Note 1 to entry: A tensor quantity often describes a linear transformation of a vector quantity : V${V}_{i}={\displaystyle \sum _{j}{Q}_{ij}}{U}_{j}$ Note 2 to entry: The expression of a tensor quantity in terms of its components is similar to the expression of vector quantities (see Note 1 to entry in IEV 102-03-22). Examples of tensor quantities are the permittivity and the permeability in anisotropic media, see IEC 60050-121. Note 3 to entry: Operations defined for tensors apply to tensor quantities. | ||

Publication date: | 2008-08 | ||

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Internal notes: | 2017-02-20: Editorial revisions in accordance with the information provided in C00019 (IEV 102) - evaluation. JGO | ||

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$Q=qT$

Note 1 to entry: A tensor quantity often describes a linear transformation of a vector quantity ** U** into a vector quantity

${V}_{i}={\displaystyle \sum _{j}{Q}_{ij}}{U}_{j}$

Note 2 to entry: The expression of a tensor quantity in terms of its components is similar to the expression of vector quantities (see Note 1 to entry in IEV 102-03-22). Examples of tensor quantities are the permittivity and the permeability in anisotropic media, see IEC 60050-121.

Note 3 to entry: Operations defined for tensors apply to tensor quantities.