Physics
Which among the following is false about displacement?

It can be positive, negative or zero
Its SI unit is meter
It is always positive
Displacement is never greater than Distance

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Physics
The Hooke's law is valid for

Only proportional region of the stress strain curve
Entire elastic region of the stress strain curve
Entire stress strain curve
Elastic as well as plastic region of the stress strain curve

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Physics
Super conductors are substances that

Conduct electricity at low temperature
Conduct electricity at high temperature
Offer high resistance to the flow of electric current
Offer minimum resistance to flow of electric current

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