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

Increases

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Remains the same

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May increase or decrease

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Decreases

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Solution

The correct option is D
Decreases

The effective value of g increases due to increase in attraction between positively charged metallic plate and negatively charged metallic bob. Hence time period decreases. $∵ T \propto \frac{1}{\sqrt{g}}$

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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 large positively charged metallic plate, its period of oscillation will be,

The correct option is D Decreases The effective value of g increases due to increase in attraction between positively charged metallic plate and negatively charged metallic bob. Hence time period decreases. ∵T∝1√g

The correct option is D
Decreases

The effective value of g increases due to increase in attraction between positively charged metallic plate and negatively charged metallic bob. Hence time period decreases. $∵ T \propto \frac{1}{\sqrt{g}}$