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

None of these
Series
Parallel
Mixed arrangement

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Physics
An egg sinks in soft water but floats in a concentrated solution of salt because

Egg absorbs salt from the solution and expands
Albumin dissolves in salt solution and egg becomes lighter
Water has high surface tension
The density of salt solution exceeds the density of eggs

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Physics
Superconductors are substances which

offer high resistance to the flow of current
offer no resistance to the flow of electricity
conduct electricity at low temperature
conduct electricity at high temperatures

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