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Which of the following methods are used for producing damping torque in analog instruments? 1) Air friction damping 2) Fluid friction damping 3) Eddy current damping 4) Electromagnetic damping
Consider the following types of damping: 1. Air-friction damping 2.Fluid-friction damping 3.Eddy-current damping PMMC type instruments use which of the above?
If the damping factor is less than the damping factor at critical damping, the time response of the system is ___________
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to
Find critical damping coefficient if damping ratio is 0.5 and damping coefficient is 1.1.
A vehicle suspension system consists of a spring and a damper. The stiffness of the spring is 3.6 kN/m and the damping constant of the damper is 400 Ns/m. If the mass is 50 kg, then the damping factor (d ) and damped natural frequency (fn), respectively, are
The equation of motion for a vibrating system with viscous damping is d2x/dt2 + c/m X dx/dt + s/m X x = 0 If the roots of this equation are real, then the system will be
The equation of motion for a vibrating system with viscous damping is $$\frac{{{d^2}x}}{{d{t^2}}} + \frac{c}{m} \times \frac{{dx}}{{dt}} + \frac{s}{m} \times x = 0,$$      if the roots of the equation are __________ then the system will be under damped.
The equation of motion for a vibrating system with viscous damping is $$\frac{{{d^2}x}}{{d{t^2}}} + \frac{c}{m} \times \frac{{dx}}{{dt}} + \frac{s}{m} \times x = 0.$$      If the roots of this equation are real, then the system will be
 A mass of 50 kg suspended from one end of a helical spring, the other end being fixed. The stiffness of the spring is 100 N/m. The resistance of air damping is given as 0.1 N/m/s vibrating freely at its natural frequency of 10 rad/s. What will be the magnification factor at resonance of the spring?