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Physics

Physics
The flux commonly used in brazing is

Zinc chloride
Ammonium chloride
Resin plus alcohol
Borax

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Physics
Copper wires are generally used for electrical power transmission instead of iron wire because :

Copper can take higher power than iron
Copper is lighter than iron
Copper is a better conductor of electricity than iron
Copper is cheaper than iron

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Physics
Who discovered X-ray

Pierre Curie
Ernest Rutherford
Wilhelm Rontgen
Marie Curie

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Physics
The substance which conducts current in the solid state is

Diamond
Sodium chloride
Iodine
Graphite

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Physics
If the phase difference between two points is 120° for a wave with velocity of 360 m/s and frequency 500 Hz, then path difference between the two points is

6 cm
12 cm
1 cm
24 cm

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Physics
A body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/s2)

100 J
400 J
200 J
0 J

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