Physics
A parallel-plate capacitor,with air in between the plates, has capacitance C. Now the space between the two plates of the capacitor is filled with a dielectric of dielectric constant 7. Then the value of the capacitance will become

14C
7C
C/7
C

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Physics
The Hooke's law is valid for

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

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