Q. Which of the following statements about specific heat of a body is/ are correct ?
1. It depends upon mass and shape of the body.
2. It is independent of mass and shape of the body.
3. It depends only upon the temperature of the body
Select the correct answer using the code given below :
1) 1 only
2) 2 and 3
3) 1 and 3
4) 2 only
Q. Which one of the following is an example of the force of gravity of the earth acting on a vibrating pendulum bob ?
1) Applied force
2) Frictional force
3) Restoring force
4) Virtual force
Q. Which one of the following statements about the refractive index of a material medium with respect to air is correct ?
1) It can be either positive or negative
2) It can have zero value
3) It is unity for all materials
4) It is always greater than one
Q. Which one of the following statements about magnetic field lines is not correct ?
1) They can emanate from a point
2) They do not cross each other
3) Field lines between two poles cannot be precisely straight lines at the ends
4) There are no field lines within a bar magnet
Q. Two convex lenses with power 2 dioptre are kept in contact with each other. The focal length of the combined lens system is -
1) 0.10 m
2) 2 m
3) 4 m
4) 0.25 m
Q. Which one of the following alkali metals has lowest melting point ?
1) Sodium
2) Potassium
3) Rubidium
4) Caesium
Q. Which one of the following metals is alloyed with sodium to transfer heat in a nuclear reactor ?
1) Potassium
2) Calcium
3) Magnesium
4) Strontium
Q. Which one of the following metals is used in the filaments of photo-electric cells that convert light energy into electric energy ?
1) Tungsten
2) Copper
3) Rubidium
4) Aluminium
Q. Which one of the following Himalayan vegetation species is found between the altitudes of 1800 to 2600 metres ?
1) Saal
2) Chir
3) Spruce
4) Deodar
Q. Brine is an aqueous solution of -
1) NaC1
2) NaOH
3) NaHCO3
4) Na2C03
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