Question 21 : Mercury is commonly used as a thermometric fluid rather than water because
1. specific heat of mercury is less than water
2. specific heat of mercury is more than water
3. mercury has greater visibility than water
4. density of mercury is more than the water
View Answer   Discuss with Members

Question 22 : If two bodies of different masses, initially at rest, are acted upon by the same force for the same time, then the both bodies acquire the same
1. velocity
2. momentum
3. acceleration
4. kinetic energy
View Answer   Discuss with Members

Question 23 : Stars which appear single to the naked eye but are double when seen through a telescope are
1. novas and supernovas
2. binaries
3. asteroids
4. quasars
View Answer   Discuss with Members

Question 24 : Railway tracks are banked on curves
1. necessary centrifugal force may be obtained from the horizontal component weight of the train
2. to avoid frictional force between the tracks and wheels
3. necessary centripetal force may be obtained from the horizontal component of the weight of the train
4. the train may not fly off in the opposite direction
View Answer   Discuss with Members

Question 25 : Rain is falling vertically downwards. To a man running east-wards, the rain will appear to be coming from
1. east
2. west
3. northeast
4. southeast
View Answer   Discuss with Members

Question 26 : Nuclear sizes are expressed in a unit named
1. Fermi
2. angstrom
3. newton
4. tesla
View Answer   Discuss with Members

Question 27 : Solar eclipse will take place when
1. the sun is between the moon and the earth
2. the earth is between the moon and the sun
3. the moon is between the sun and the earth
4. the moon does not lie on the line joining the sun and the earth
View Answer   Discuss with Members

Question 28 : Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2
1. 0.14 m/s
2. 140 m/s
3. 1.4 km/s
4. 14 m/s
View Answer   Discuss with Members

Question 29 : Of the following properties of a wave, the one that is independent of the other is its
1. amplitude
2. velocity
3. wavelength
4. frequency
View Answer   Discuss with Members

Question 30 : Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
1. Scattering
2. Diffraction
3. Interference
4. Polarization
View Answer   Discuss with Members