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Coz within the less time,pointer of an analog device gets stablilized and

at one point and gives us the required measuring value instantly---this happens in case of critical damping.

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12y ago

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Controlling torque controls the deflection and tries to stop the pointer at its final position.But due to inertia, the pointer oscillates around its final position before coming to rest. Hence damping torque is provoded to avoid this oscillation and bring the pointer quickly to its final position.Thus the damping torque is never greater than the controlling torque. In fact it is the condition of critical damping which is sufficient to enable the pointer to rise quickly to its deflected position without overshooting.


What is deflecting torque?

Controlling torque controls the deflection and tries to stop the pointer at its final position.But due to inertia, the pointer oscillates around its final position before coming to rest. Hence damping torque is provoded to avoid this oscillation and bring the pointer quickly to its final position.Thus the damping torque is never greater than the controlling torque. In fact it is the condition of critical damping which is sufficient to enable the pointer to rise quickly to its deflected position without overshooting.


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