Physics-Objective Related Question Answers
1301. Isotopes of an element contain?
the same number of protons but different number of neutrons
1302. One watt-hour is equivalent to?
3.6 x 103 J
1303. Sir C.V. Raman was awarded Nobel Prize for his work connected with which phenomenon of radiation?
Scattering
1304. Radiocarbon dating technique is used to estimate the age of?
fossils
1305. Large astronomical telescopes always use as objective?
combinations of lenses
1306. One should not connect a number of electrical appliances to the same power socket because?
this can damage the domestic wiring due to overloading
1307. Rainbow is produced when sunlight fall on drops of rain. Which of the following physical phenomena are responsible for this : Diffusion, Refraction, Internal reflection?
II and III
1308. Natural radioactivity was discovered by?
Henri Becquerel
1309. Planets are?
non-luminous heavenly bodies
1310. One nanometer is equal to?
10-9m
1311. Mica is used in electrical appliances such as electric iron because mica is?
a good conductor of heat but a bad conductor of electricity
1312. It is easier to roll a barrel full of coal tar than to pull it because?
the rolling friction is much less than the sliding friction
1313. Minimum number of unequal vectors which can give zero resultant are?
three
1314. Intensity of sound has?
an object existence
1315. Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from?
east
1316. 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?
3.33 km
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