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A simple pendulum has a length l & mass of bob m. The bob is given a charge q coulomb. The pendulum is suspended in a uniform horizontal electric field of strength, then calculate the time period of osscillation when the bob is slightly displaced from its mean position.

A simple pendulum has a length l & mass of bob m. The bob is given a charge q coulomb. The pendulum is suspended in a uniform horizontal electric field of strength, then calculate the time period of osscillation when the bob is slightly displaced from its mean position.
 

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1 Answers

Arun
25750 Points
4 years ago
in the formula g stands for total acceleration on bob. In free status gravitational acceleration is only applied on bob. But in existence of electric field the resultant acceleration is different and equal to the resultant of gravitational and electrical acceleration. As we know the resultant amplitude of vector of perpendicular vectors a and b is (a^2+b^2)^1/2 so in answer g is replaced by given term as the electrical acceleration is qE/m

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