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  1. A

    damping ratio of systems with poles at origin in control theory

    hi all.. i've a doubt regarding damping ratio of systems with poles at origin. Like one 2nd order eqn. as below 1/(s^2+2s) This eqn seems to have zero natural frequency I'm confused abt its damping ration.. Pls help abhijith
  2. A

    relay ticking noise from ups

    hi all, as soon as i switch on my ups some ticking noise is coming from it. even before i connect the load. bt, it works well on battery, when supply is disconnected.i disconnected all other loads in my home and still the problem persists... somebody help me.

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