general knowledge ouestions in physics

. 1.	Radiocarbon is produced in the atmosphere as a result of
	A. collision between fast neutrons and nitrogen nuclei present in the atmosphere B. action of ultraviolet light from the sun on atmospheric oxygen C. action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere D. lightning discharge in atmosphere Answer: Option A 2.  It is easier to roll a stone up a sloping road than to lift it vertical upwards because A. work done in rolling is more than in lifting B. work done in lifting the stone is equal to rolling it C. work done in both is same but the rate of doing work is less in rolling D. work done in rolling a stone is less than in lifting it Answer: Option D 3.  The absorption of ink by blotting paper involves A. viscosity of ink B. capillary action phenomenon C. diffusion of ink through the blotting D. siphon action Answer: Option B 4.  Nuclear sizes are expressed in a unit named A. Fermi B. angstrom C. newton D. tesla Answer: Option A 5.  Light from the Sun reaches us in nearly A. 2 minutes B. 4 minutes C. 8 minutes D. 16 minutes Answer: Option C