You Are On Question Answer Bank SET 2030
101501. Moment of inertia is?
101502. Inside an aeroplane, flying at a high altitude,?
Answer: normal atmospheric pressure is maintained by the use of air pumps
101503. Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?
Answer: Air; water and iron
101504. One thousand microns is equal to?
101505. Sound travels at the fastest speed in?
101506. oil raise up the wick in a lamp. The principle involves?
Answer: capillary action phenomenon
101507. Superconductors are substances which?
Answer: offer no resistance to the flow of electricity
101508. Light travels at the fastest speed in?
101509. Railway tracks are banked on curves?
Answer: necessary centripetal force may be obtained from the horizontal component of the weight of the train
101510. On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because?
Answer: metals are good conductor of heat
101511. Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?
Answer: 3.3 km; 0.30 km
101512. Intensity of sound at a point is ____ its distance from the source.?
Answer: inversely proportional to square of
101513. Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open?
Answer: at a place in a valley below sea level
101514. Radio telescopes are better than optical telescopes because?
Answer: All of the above
101515. Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit?
Answer: visible light
101516. Mercury is commonly used as a thermometric fluid rather than water because?
Answer: mercury has greater visibility than water
101517. Optical fibre works on the?
Answer: total internal reflection
101518. Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in?
Answer: 4.2 years
101519. Mach number is used in connection with the speed of?
101520. On a stationary sail boat, air is blown from a fan attached to the boat. The boat?
Answer: does not move
101521. Rainbow is due to?
Answer: refraction and reflection of sunlight by water droplets
101522. Stars which appear single to the naked eye but are double when seen through a telescope are?
101523. ML2T-2 is the dimensional formula for?
Answer: couple acting on a body
101524. Solar eclipse will take place when?
Answer: the moon is between the sun and the earth
101525. Isotopes of an element contain?
Answer: the same number of protons but different number of neutrons
101526. One watt-hour is equivalent to?
Answer: 3.6 x 103 J
101527. Sir C.V. Raman was awarded Nobel Prize for his work connected with which phenomenon of radiation?
101528. Radiocarbon dating technique is used to estimate the age of?
101529. Large astronomical telescopes always use as objective?
Answer: combinations of lenses
101530. One should not connect a number of electrical appliances to the same power socket because?
Answer: this can damage the domestic wiring due to overloading
101531. Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this : Diffusion, Refraction, Internal reflection?
Answer: II and III
101532. Natural radioactivity was discovered by?
Answer: Henri Becquerel
101533. Planets are?
Answer: non-luminous heavenly bodies
101534. One nanometer is equal to?
101535. Mica is used in electrical appliances such as electric iron because mica is?
Answer: a good conductor of heat but a bad conductor of electricity
101536. It is easier to roll a barrel full of coal tar than to pull it because?
Answer: the rolling friction is much less than the sliding friction
101537. Minimum number of unequal vectors which can give zero resultant are?
101538. Intensity of sound has?
Answer: an object existence
101539. Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from?
101540. An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at point B. The distance AB is?
Answer: 3.33 km
101541. Father of Chemistry?
Answer: Robert Boyle
101542. The author of the book 'Sceptical Chymist’ is?
Answer: Robert Boyle
101543. Father of of Indian Chemistry?
Answer: P.C. Roy
101544. Father of Organic Chemistry?
Answer: Friedrich Wohler
101545. Ancient Chemistry is known as?
101546. Ancient Chemists were known as?
101547. The scientist known as the father of Soda pop?
Answer: Joseph Priestly
101548. International year of chemistry was?
101549. എടത്വ, മാരാമൺ എന്നീ സ്ഥലങ്ങളിലൂടെ കടന്നുപോകുന്ന നദി? [Edathva, maaraaman ennee sthalangaliloode kadannupokunna nadi?]
Answer: പമ്പ [Pampa]
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101550. New methods used in chemistry which aim to reduce pollution are called?
Answer: Green Chemistry
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