why displacment is more in tangential forces than in parallel forces why?
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Displacement in parallel direction
Comb actuators make use of tangential electrostatic force for driving. According to §4.1.2, the tangential force is not dependent on the tangential displacement. Therefore, the displacement is very easy to find.
As was discussed in §4.1.2, normal electrostatic force always exists along with tangential force and it is usually much larger than the tangential force. To eliminate the effect of normal force the stationary electe arranged symmetrically on both sides of each movable finger so that the normal forces from both sides cancel out by pairs,
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