Physics
Which of the following is not a valid conservation law of classical physics?

Law of conservation of energy
Law of conservation of charge
Law of conservation of current
Law of conservation of angular momentum

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Physics
To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor

Can be of any shape
Should be in the form of a vertical rod
Should be made of a good conductor but can be of any shape
Should be made of a good conductor like copper with sharp-pointed edges

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