Karnatak University 2006 SCIENCE — I ( Physics

(A) visual (B) infrared
(C) ultraviolet (D) gamma.
16. The components of the coal gas are
(A) H two , CH four , CO (B) CO two , C two H six , N 2
(C) CO, H two , N two (D) C two H two , CO two , H two .
17. If you want to use a fuel without any processing, then you can choose
(A) petroleum gas (B) coke
(C) natural gas (D) kerosine.
18. The device used to remove the excess heat from an automobile engine is
(A) carburetor (B) radiator
(C) spark plug (D) crankshaft.
19. When 1000 kJ of heat is supplied to an engine it converts 500 kJ of heat into work.
Then the efficiency of the engine is
(A) 10% (B) 20%
(C) 50% (D) 100%.
20. The radioactive isotope used in the treatment of thyroid cancer is
(A) iodine (B) cobalt
(C) phosphorus (D) sodium.
21. Liquid sodium is used in a nuclear power reactor during energy transmission to
(A) produce energy (B) begin fission reaction
(C)absorb heat energy (D) stop the fission reaction.
22. The strong force of attraction ranging from the nucleons is
(A) mechanical force (B) magnetic force
(C) kinetic force (D) nuclear force.
23. The number of neutrons current in the isotope of carbon 6
C 14 is
(A) four (B) 8
(C) 10 (D) 24.
24. Which of the subsequent contributes to decrease energy crisis ?
(A) L.P.G stove (B) Electric heater
(C) Tubelight (D) Solar heater.
25. 1 of the reasons for increase in energy crisis is
(A) solar devices (B) well designed houses
(C) biogas plants (D) increasing automobiles.
26. The electromagnetic radiations used in night vision is
(A) infrared (B) radio
(C) visible (D) ultraviolet.
27. Light is a stream of tiny packets called
(A) protons (B) neutrons
(C) photons (D) electrons.

Earning:   Approval pending.