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A bob of a simple pendulum of length l i...

A bob of a simple pendulum of length l is negatively charged. A positively-charged metal plate is placed just below the bobt and the pendulum is made to oscillate. What will be the effect on the time period of the pendulum?

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Due to force of attraction between positively charged metal plate and negatively charged bob of pendulum, the effective value of 'g' increases. As `Tprop1//sqrt(g)`, so the time period will decrease.
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