Physics
Indicate the false statement about the resistance of a wire

It is directly proportional to the length of wire
It is directly proportional to the area of cross-section of wire
It depends on material of wire
Resistance of metallic wire increases with increase in temperature

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Physics
Siphon will fail to work if:

Both its limbs are of unequal length.
The temperature of the liquids in the two vessels are the same.
The level of the liquid in the two vessels are at the same height.
The densities of the liquid in the two vessels are equal.

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