Everyday Science Mcqs 11

EVERYDAY SCIENCE PHYSICAL PROPERTIES MCQS

• A theory of acquired character was given by Lamark.

• Charles Darwin is famous for his theory of struggle for existence and survival of the fittest.

• Sigmund Freud is called as the father of modern psychiatry and psychology.

• Energy stored in stretched spring is Elastic Potential energy

• Energy stored in fossil fuels is chemical energy

• Radio waves are Electromagnetic waves

• A.C voltage is analogue quantity

• Optical fibers work on polarization of electromagnetic waves

• Condenser is used to collect the charge

• In diesel engine ignition takes place by compression

• A radar uses radio waves to detect enemy aircraft

• Law of floating bodies was given by Archimedes

• Particle with +ve charge but mass equal to electron is positron

• Nucleus of an atom has +ve charge.

• Bosons are Photons and Mesons

• There is no neutron in the atom of hydrogen

• Quark is an atomic particle. Scientists think that proton and neutrons are themselves made of still smaller 

particles called quarks

• Muttons are particles of atom

• John Dalton, an English scientist, gave Atomic Theory in 1803 describing atom as the smallest unit of an 

element

• Gas in children’ s balloon is Helium

• Weight of electron = 9.1 x 10 power -31 kg

• Charge on electron = 1.6 x 10 power -19 coulomb

• Weight of proton = 1.66 x 10 power -27 kg

• Charge on proton = 1.6 x 10 power -19 coulomb

• A proton is 1836 times heavier than an electron

• Ordinarily and atom is a neutral particle

• Ernest Rutherford, a New Zealander, in 1908 discovered Atomic Nucleus

• Speed of sound is faster in hot air than in cold air

• Ultrasonic are sound waves of high frequency = 12000 cycles/sec and higher

• Sound travels faster in moist air than in dry air

• Sound travels more rapidly in solids

• Maximum limit of sound beyond which a man can become deaf is 129 decibel

• Audible sound is 20-20,000 cycles/second

• Inaudible sound >20,000 cycles/second

• Velocity of sound at 0 deg: C is 331.7 m/s

• Echo can only be produces when the distance of the obstacle is at least 17 meters

• When we hear a sound, its impressions remain in our ear for 1/10th of a second

• Image persists for about 1/10th of second in our eye

• For creating a persistence of vision, pictures are projected at the rate of 10 or more/sec

• Nuclear Energy is not a source of alternative energy.

• Videotape used in camcorders to record audio and video signal employee fine grains of iron oxide.

• Temperature inside a refrigerator is 40 deg: F

• The laws of reflection were first discovered by a al- Hazen

• 0.200 grams are equal to one carat.

• One million cycles per second is called Megahertz.

• Carbon fiber is made by heating textile fibers. These are used in tennis rackets and racing yacht

• Catalytic converter reduce the harmful fumes the engine emits 

• If you double the voltage you double the current (Ohm’s law)

• What product uses the most silver-Camera Film

• The speed of sound depends on the medium through which the waves are passing. The speed of sound in 

gases depends on what? Density

• Two or more molecules of carbohydrates are linked together through glycosidic bond

• peptide bond b\w amino acids, joined to form proteins, is the linkage b/w N and C

• An android is any robot that: has the ability to make decisions and formulate plans

• Semaphores were used between sailors for many years to communicate between ships

• One of the first long distance communication system invented in 1790 was the semaphores towers

• Telegraph was invented in 1821

• Telephone was invented in1876

• Us inventor Samuel More developed the system of dots and dashes of telegraph that was known as Morse Code

• Scientist now think that protons and Neutrons are themselves made of still smaller particles called quarks.

• Portable gadgets = Mobile phones and portable TVs.

• Derailleur gears are used in Bicycles.

• Motor – cross race is for motor cycles.

• Cantilever brake used in Bicycle.

• Speed of light 300,000 kilometers per second.