Physics
Fuse wire is made of an alloy of

Tin and Lead
Copper and Silver
Lead and Copper
Tin and Copper

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Physics
Pressure Cooker cooks faster because

Higher temperature is attained for cooking
It cooks the food at low pressure
Boiling point decreases with rise of pressure
The material of the cooker is a good conductor

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Physics
The Hooke's law is valid for

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

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