Definition: | - for n quantities , positive square root of the mean value of their squares:
- for a quantity x depending on a variable t, positive square root of the mean value of the square of the quantity taken over a given interval of the variable:
NOTE 1 The root-mean-square value of a periodic quantity is usually taken over an integration interval the range of which is the period multiplied by a natural number. NOTE 2 The root-mean-square value of a quantity is denoted by adding the subscript q to the symbol of the quantity.
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