Physics
If electric resistance is to be decreased, then the number of resistances should be connected in ________

None of these
Parallel
Mixed arrangement
Series

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Physics
Siphon will fail to work if:

Both its limbs are of unequal length.
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.
The temperature of the liquids in the two vessels are the same.

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