{"id":47188,"date":"2024-04-15T22:23:12","date_gmt":"2024-04-15T22:23:12","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=47188"},"modified":"2024-04-15T22:23:12","modified_gmt":"2024-04-15T22:23:12","slug":"phase-margin-of-a-system-is-used-to-specify-which-of-the-following","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/phase-margin-of-a-system-is-used-to-specify-which-of-the-following\/","title":{"rendered":"Phase margin of a system is used to specify which of the following ?"},"content":{"rendered":"

[amp_mcq option1=”Frequency response” option2=”Absolute stability” option3=”Relative stability” option4=”Time response” correct=”option3″]<\/p>\n

The correct answer is: C. Relative stability.<\/p>\n

Phase margin is a measure of how close a system is to instability. It is defined as the angle by which the phase of the open-loop transfer function of a system leads the phase of a unity-gain reference signal at the frequency where the magnitude of the open-loop transfer function is unity.<\/p>\n

A system is said to be stable if the phase margin is greater than or equal to 180 degrees. If the phase margin is less than 180 degrees, the system is said to be unstable.<\/p>\n

The phase margin is a useful tool for designing and analyzing control systems. It can be used to determine the stability of a system and to design controllers that will improve the stability of a system.<\/p>\n

Here is a brief explanation of each option:<\/p>\n