A simple pendulum of period T has a metal bob which is negatively charged. If it is allowed to oscillate above a positively charged metal plate, its period will

Remains equal to T

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Less than T

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Greater than T

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Infinite

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Solution

The correct option is B Less than T
When a negatively charged pendulum oscillates over a positively charged plate then effective value of g increases so according to $T = 2 π \sqrt{\frac{l}{g}}$ , T decreases.

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A simple pendulum of period T has a metal bob which is negatively charged. If it is allowed to oscillate above a positively charged metal plate, its period will

The correct option is B Less than TWhen a negatively charged pendulum oscillates over a positively charged plate then effective value of g increases so according to T=2π√lg, T decreases.

The correct option is B Less than T
When a negatively charged pendulum oscillates over a positively charged plate then effective value of g increases so according to $T = 2 π \sqrt{\frac{l}{g}}$ , T decreases.