Physics

Q 9. Recoil of a gun is an example of A) Conservation of mass B)conservation of energy C)conservation of linear momentum D) conservationofPE into KE Answer : Option C Explanation: No answer description available for this question. Q 10. Which one of the following would be most powerful electro magnet? A)soft iron B)steel C)copper D) air Answer : Option A Explanation: No answer description available for this question. Q 11. Lux is the SI unit of A)luminous efficiency B)luminous flux C)luminous intensity D)intensity of illumination Answer : Option D Explanation: The SI unit of intensity of illumination (illuminance) is the lux. An illuminance of 1.0 lux is produced by 1.0 lumen of light shining on an area of 1.0 m^2. Q 12. What is the heaviest of the naturally occuring Noble gases? A) Xenon B) Helium C) Radon D) Argon Answer : Option C Explanation: No answer description available for this question.

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