Which of the following indicates the correct set of frequency employed in measuring process?

Which of the following indicates the correct set of frequency employed in measuring process? Correct Answer 7.5*106 to 5*108 Hz

In general, the present situation needs a frequency range of approximately 7.5*106 to 5*108 Hz. This can be used in order to determine the distance between the points and also employed in EDM instruments.

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If A indicates >; B indicates <; C indicates = ; D indicates + ; E indicates -; F indicates × ; G indicates /: then which of the following option is true?