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Physics

Physics
Positive feedback is used in

Rectifiers
None of these
Oscillators
Amplifiers

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Physics
For which of the following substances, the resistance decreases with increase in temperature?

Pure silicon
Platinum
Nichrome
Copper

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Physics
The flux commonly used in brazing is

Resin plus alcohol
Ammonium chloride
Borax
Zinc chloride

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Physics
Wind and solar energy are examples of

Unsustainable
Limited
Non renewable
Renewable

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Physics
Which of the following represents a relation for ''heat lost = heat gained'?

Principle of vaporization
Principle of colors
Principle of calorimetry
Principle of thermal equilibrium

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Physics
An ideal gas cannot be

Liquified
None of these
Solidified
Both A & B

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