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You Are On Question Answer Bank SET 2030

101501. Moment of inertia is?

Answer: tensor

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?

Answer: 10-3m

101505. Sound travels at the fastest speed in?

Answer: steel

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?

Answer: vacuum

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?

Answer: aircraft

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?

Answer: binaries

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?

Answer: Scattering

101528. Radiocarbon dating technique is used to estimate the age of?

Answer: fossils

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?

Answer: 10-9m

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?

Answer: three

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?

Answer: east

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?

Answer: Alchemy

101546. Ancient Chemists were known as?

Answer: Alchemists

101547. The scientist known as the father of Soda pop?

Answer: Joseph Priestly

101548. International year of chemistry was?

Answer: 2011

101549. എടത്വ, മാരാമൺ എന്നീ സ്ഥലങ്ങളിലൂടെ കടന്നുപോകുന്ന നദി? [Edathva, maaraaman ennee sthalangaliloode kadannupokunna nadi?]

Answer: പമ്പ [Pampa]

101550. New methods used in chemistry which aim to reduce pollution are called?

Answer: Green Chemistry
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