Physics-Objective Related Question Answers
1201. X-ray was invented by?
Wilhelm K Roentgen
1202. Who discovered the existence of the nucleus inside the atom?
Rutherford - in 1911
1203. Who propounded the theory of electrolysis?
Faraday
1204. Who discovered Battery (electric)?
Alessandro volta
1205. Who discovered superconductivity?
Cammerling Onnes
1206. Who invented Diesel Engine?
Rudolf Diesel
1207. What is called stress?
The restoring force per unit area set up inside the body is called stress
1208. What is the unit of stress?
C.G.S. system-dyne/cm2; M.K.S. system-newton / m2
1209. Which substance has the highest elasticity?
Steel
1210. What is the escape speed from the moon?
2.37 km / sec.
1211. Which is the direction of rotation of a synchronous satellite of earth?
West to east
1212. A particular star has mass twice that of sun. This star will end up eventually as a?
Black hole
1213. The escape velocity of a projectile from the earth is approximately?
11.2 km / sec.
1214. As we go from the equator to the poles, value of ‘g’?
increases
1215. The weight of a body at the centre of the earth is?
Zero
1216. Weightlessness experienced while orbiting the earth in space ships is the result of?
Acceleration
1217. To an astronaut in a spaceship the sky appears black due to?
Absence of atmosphere in its neighbourhood
1218. The value of ‘g’ on equator is?
Minimum
1219. Persons sitting in artificial satellite of the earth have?
Zero weight
1220. The period of geo-stationary artificial satellite of the earth is?
24 hrs.
1221. The atmosphere is held to the earth by?
Gravity
1222. What is thermoplastic?
A substance which softens on heating and hardens on - cooling
1223. Where does the water in a reservoir exert pressure?
In all direction
1224. Which quantity has direction as well as magnitude?
Vector quantity
1225. What is the branch of science concerning the study of bodies in motion?
Kinetics
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