What is the frequency ratio defined as in electromagnetic testing?

The frequency ratio in electromagnetic testing is defined as the test frequency divided by the limit frequency. This ratio is important because it provides insight into how the test frequency relates to the frequency at which the electromagnetic phenomena are expected to occur or be detectable. By analyzing this ratio, inspectors can assess the suitability of the testing frequency for detecting specific flaws or material properties.

Understanding this concept enables practitioners to optimize their testing procedures and achieve more accurate results. The concept of a limit frequency is particularly critical because it often indicates a threshold at which the material exhibits certain electromagnetic characteristics, aiding in more effective flaw detection and evaluation.