Description : In Helium-neon Laser discharge tube, neon gas is a) 85% b) 15% c) 75% d) 45%
Last Answer : b) 15%
Description : In Helium-neon Laser, in meta stable state, helium is located at the energy level: a) 20.66 eV b) 20.77 eV c) 20.61 eV d) 20.71 eV
Last Answer : c) 20.61 eV
Description : Common type of Laser used in physics laboratories is a) hydrogen neon Laser b) helium-neon Laser c) carbon neon Laser d) argon neon laser
Last Answer : b) helium-neon Laser
Description : For design of sewers, percentage of sewage discharge is assumed A. 65 to 70% B. 70 to 75% C. 75 to 80% D. 85%
Last Answer : ANS: C
Description : Type of lasers that uses a mixture of helium and neon enclosed in glass tube. ∙ A. gas lasers ∙ B. solid lasers ∙ C. semiconductor lasers ∙ D. liquid lasers
Last Answer : A. gas lasers
Description : The coloured discharge tubes for advertisement mainly contain (1) Xenon (2) Argon (3) Helium (4) Neon
Last Answer : Neon
Description : Which type of laser is the simplest to modulate directly by changing its excitation? a. Semiconductor b. Ruby c. Helium-neon d. Neodymium-YAG
Last Answer : a. Semiconductor
Description : Which type of laser is the simplest to modulate directly by changing its excitation? ∙ a. Semiconductor ∙ b. Ruby ∙ c. Helium-neon ∙ d. Neodymium-YAG
Last Answer : Semiconductor
Description : What is the wavelength of red light emitted by a helium-neon laser? w) 122 nanometers x) 633 nanometers y) 2.43 picometers z) 1.37 micrometers
Last Answer : ANSWER: X -- 633 NANOMETERS (actually 632.8 nm)
Description : Neon gas is (A) Flammable in nature (B) Used in color discharge tube (C) Filled in lamps having tungsten filament (D) All (A), (B) and (C)
Last Answer : (B) Used in color discharge tube
Description : A high voltage applied to a gas discharge tube containing neon gas at very low pressure causes a current to flow through the tube. Which one of the following are the particles that flow towards the ... Are they w) electrons x) protons y) negatively charged neon ions z) positively charged neon ions
Last Answer : ANSWER: Z -- POSITIVELY CHARGED NEON IONS
Description : The gas which was identified in the Sun using spectroscopy before its discovery on earth, is a) oxygen b) hydrogen c) helium d) nitrogen
Last Answer : c) helium
Description : In blood, the percentage of water is _____. A. 75% B. 85% C. 90% D. 95%
Last Answer : ANSWER: C
Description : In blood, the percentage of water is------? A. 75% B. 85% C. 90% (Answer) D. 95%
Last Answer : C. 90% (Answer)
Description : In Kinnow mandarin, fruit drop in month of June is upto: a. 70% b. 75% c. 80% d. 85%
Last Answer : 75%
Description : An Image is represented by 65536 X8 bits, and after compression it reduced to 16384 X8 bits. What will be the compression ratio: a. 55% b. 65% c. 75% d. 85%
Last Answer : c. 75%
Description : A neon flashlight cell with an emf of 1.5V gives a current of 15A when connected directly to an ammeter of resistance 0.04?. Internal resistance of the cell is a. 0.0004? b. 0.06? c. 0.10? d. 0.13?
Last Answer : b. 0.06?
Description : CV = $70,000; AC = 90,000; Budget = $200,000. What percent of the project is complete? Select one: a. 80% b. 53% c. 45% d. 35% e. 75% Answer - a. 80% 39. As a project manager, John ... paid off the project. d. John's boss is happy. e. John and his team are promoted and get salary increases.
Last Answer : c. John’s client has paid off the project.
Description : Rosy buys Oats at Rs.10/kg and sell it in order to earn a profit of 40%. However, her faulty balance shows 1000gm when it is actually 800gm. What is her actual gain percentage? a) 35% b) 70% c) 75% d) 25% e) None of the Above
Last Answer : Let price of 1 kg rice = Rs.10. CP of 800 gm rice = Rs.8. She wants to earn a profit of 40% on per Kg SP = 10 + 40% of 10 = Rs. 14 per kg. Faulty balance shows 800 gm = 1000 gm (1 kg) She sells 800 gm for Rs.14. Profit = 14 – 8 = Rs. 6. Profit(%) = 6/8 * 100 = 75%. Answer: c)
Description : In 165 litres of mixtures of milk and water, water is only 28%. The milkman sold 40 litres of this mixture and then he added 30 litres of pure milk and 13 litres of pure water in the remaining mixture. What is the percentage ... mixture? 1) 29.35% 2) 28. 57% 3) 24. 57% 4) 27. 75% 5) 26. 57%
Last Answer : 2) 28. 57%
Description : Helium is subjected to electrical discharge. The following species is not present in the discharge tube
Last Answer : Helium is subjected to electrical discharge. The following species is not present in the discharge tube A. `He^(+)` B. `He_(2)^(+)` C. `He_(2)` D. He
Description : We've always known that smoking is terrible for our health, yet until quite recently at least 35% of American adults smoked. What turned that figure to approximately 15% (CDC figures for 2015) and in some communities, down to 10%?
Last Answer : Ten bucks a pack along with relegation of smokers to the status of lepers.
Description : Pick up the incorrect statement from the following: (A) Porosity of clay sand soil is 45% (B) Porosity of pure sand is 35% (C) Porosity of sand stone is up to 15% (D) None of these
Last Answer : (D) None of these
Description : Carbide tipped cutting tools are manufactured by powder metallurgy techniques and have a composition of (A) 90% tungsten carbide and 10% cobalt (B) 70% aluminium oxide & 30% silica (C) 30% nickel, 15% chromium & 55% tungsten (D) 65% tungsten & 35% zirconium
Last Answer : Option A
Description : Permanent magnets are made of high carbon steel and (A) 15% of cobalt (B) 20% of cobalt (C) 35% of cobalt (D) 45% of cobalt
Last Answer : Answer: Option D
Description : Rankine cycle efficiency in a good steam power station may be in the range between........ a.15% - 20% b.35% - 40% c.50% - 60% d.90% - 95%
Last Answer : b.35% - 40%
Description : What is the active agent in most home (night guard) bleaching solutions? a. 2-5% carbamide peroxide b. 10 - 15% Phosphoric acid c. 10 - 15% carbamide peroxide d. 35% hydrogen peroxide e. 5 - 10% citric acid Attention:
Last Answer : c. 10 - 15% carbamide peroxide
Description : The inert gas which is substituted for nitrogen in the air used by deep sea divers for Breathing is: (1) Neon (2) Argon (3) Krypton (4) Helium
Last Answer : (4) Helium Explanation: Helium is used since it has very low (almost non-existent) narcotic properties. The nitrogen in air is highly narcotic at depth and adding helium allows one to dive without the effects of narcosis (where one's mind is impaired).
Description : The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing is – (1) Neon (2) Krypton (3) Argon (4) Helium
Last Answer : (4) Helium Explanation: Helium is used by deep sea divers because it reduces the narcosis of nitrogen and it remains below the oxygen toxicity limits. In fact, they use tri mix of Oxygen, helium and a little bit of nitrogen.
Description : Which of the following is not a noble gas? (1) Hydrogen (2) Helium (3) Neon (4) Argon
Last Answer : (1) Hydrogen Explanation: The noble gases are the chemical elements in group 18 of the periodic table. This chemical series contains helium, neon, argon, krypton, xenon, and radon.
Description : Which among the following is used to dilute oxygen in the gas cylinders used by divers? (1) Krypton (2) Argon (3) Helium (4) Neon
Last Answer : (3) Helium Explanation: Helium is used to dilute the oxygen and nitrogen to reduce these affects. Helium is the gas of choice to use because it is an inert gas, is thinner, therefore more compressible than air, and its narcotic properties are negligible in comparison to nitrogen.
Description : The gas used to dilute oxygen for breathing by deep sea divers is- (1) Neon (2) Argon (3) Nitrogen (4) Helium
Description : The noble gas which occurs most abundantly in the atmosphere is (A) Helium (B) Neon (C) Krypton (D) Argon
Last Answer : (D) Argon
Description : Which of the following is not a noble gas ? (1) Hydrogen (2) Helium (3) Neon (4) Argon
Last Answer : Hydrogen
Description : Which among the following is used to dilute oxygen in the gas cylinders used by divers ? (1) Krypton (2) Argon (3) Helium (4) Neon
Last Answer : Helium
Description : The gas used to dilute oxygen for breathing by deep sea divers is: (1) Neon (2) Argon (3) Nitrogen (4) Helium
Description : The most abundant inert gas in the atmosphere is (1) Helium (2) Neon (3) Argon (4) Krypton
Last Answer : Argon
Description : In human flesh, the three light elements which predominate, and allow greater amount of incident X-rays to pass through them are a) oxygen, nitrogen , hydrogen b) oxygen, hydrogen, helium c) oxygen, hydrogen, carbon d) carbon, nitrogen, oxygen
Last Answer : c) oxygen, hydrogen, carbon
Description : Laser is the acronym for a) Light Amplification by Stimulated Emission of Radiation b) Light Amplification by Spontaneous Emission of Radiation c) Light Amplified by Stimulated Emission of Radiation d) Light Amplification by Standard Emission of Radiation
Last Answer : a) Light Amplification by Stimulated Emission of Radiation
Description : Laser technology has been widely used in the field of a) neurology b) astrology c) ophthalmology d) psychology
Last Answer : c) ophthalmology
Description : Laser beams can generate three dimensional images of objects in a process called a) polygraphy b) telegraphy c) holography d) autography
Last Answer : c) holography
Description : Red Laser light has a wavelength of a) 630.8 nm b) 630 cm c) 632.8 nm d) 639.9 nm
Last Answer : c) 632.8 nm
Description : In the phenomenon of Laser production, atom can reside in the meta stable state for a) ~ 10-3 s b) ~ 10-8 s c) ~ 10-4 s d) ~ 10-10 s
Last Answer : a) ~ 10-3 s
Description : In the phenomenon of Laser production, atom can reside in the excited state only for a) 10-6 s b) 10-7 s c) 10-8 s d) 10-9 s
Last Answer : c) 10-8 s
Description : The practical application of electrostatic is: (a) Photocopier (b) X-rays machines (c) Laser (d) All of above 42. The electric field lines emerge from the charges in: (a) Three dimensions (b) Two dimensions (c) One dimension (d) All of above
Last Answer : (a) Photocopier