Physics-Objective Related Question Answers
1276. It takes much longer to cook food in the hills than in the plains, because?
in the hills the atmospheric pressure is lower than that in the plains and therefore water boils at a temperature lower than 100oC causing an increase in cooking time
1277. Moment of inertia is?
tensor
1278. Inside an aeroplane, flying at a high altitude,?
normal atmospheric pressure is maintained by the use of air pumps
1279. Sound travels with a different speed in media. In what order does the velocity of sound increase in these media?
Air; water and iron
1280. One thousand microns is equal to?
10-3m
1281. Sound travels at the fastest speed in?
steel
1282. oil raise up the wick in a lamp. The principle involves?
capillary action phenomenon
1283. Superconductors are substances which?
offer no resistance to the flow of electricity
1284. Light travels at the fastest speed in?
vacuum
1285. Railway tracks are banked on curves?
necessary centripetal force may be obtained from the horizontal component of the weight of the train
1286. 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?
metals are good conductor of heat
1287. 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?
3.3 km; 0.30 km
1288. Intensity of sound at a point is ____ its distance from the source.?
inversely proportional to square of
1289. Of the four locations mentioned below the highest inside temperature will be attained in the pressure cooker operated with the pressure valve open?
at a place in a valley below sea level
1290. Radio telescopes are better than optical telescopes because?
All of the above
1291. Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit?
visible light
1292. Mercury is commonly used as a thermometric fluid rather than water because?
mercury has greater visibility than water
1293. Optical fibre works on the?
total internal reflection
1294. Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in?
4.2 years
1295. Mach number is used in connection with the speed of?
aircraft
1296. On a stationary sail boat, air is blown from a fan attached to the boat. The boat?
does not move
1297. Rainbow is due to?
refraction and reflection of sunlight by water droplets
1298. Stars which appear single to the naked eye but are double when seen through a telescope are?
binaries
1299. ML2T-2 is the dimensional formula for?
couple acting on a body
1300. Solar eclipse will take place when?
the moon is between the sun and the earth
© 2002-2017 Omega Education PVT LTD...Privacy | Terms And Conditions
Question ANSWER With Solution