Physics
The magnitude of current flowing between two end points of a conductor is proportional to the potential difference between them and is called as:

Faraday's law
Avogadro's law
Ohms law
Rault's law

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Physics
Ice is packed in saw dust because

Saw dust does not stick to the ice.
Saw dust is poor conductor of heat.
Saw dust will not get melted easily.
Saw dust is a good conductor of heat.

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