Q. Plants that grow in seashores are called as :
A) Halophytes  
B) Hydrophytes  
C)  Xerophytes  
D) Psammophytes
Q. The second law of thermodynamics introduces the concept of
A) Heat
B) Temperature
C) Entropy
D) Internal energy of the system
Q. Coins are minted in india in
A) Noida
B) kolkata
C) Mumbai
D) All of the above
Q. The velocity with which a projectile must be fired so that it escapes earth's gravitation doesnt depend on
A) mass of the earth
B) Mass of the projectile
C) Radius of the orbit
D) Gravitational constant
Q. the present ages of A and B are 2:5. nine years ago their ages were in the ratio 1:4. find the present age of A
A) 18
B) 20
C) 22
D) 24
Q. A charged particle moves through a magnetic field perpendicular to it. The energy of the particle
A) increases
B) decreases
C) remains unchanged
D) first increase and then decreases
Q. find the compound interest on Rs.50000 at 16% per annum for 2 yrs, compounded anually
A) 17280
B) 17000
C) 17500
D) 17300
Q. the potential energy associated with an electron in the orbit
A) increases with increase in radii of orbit
B) decreases with increase in radii of orbit
C) remains unchanged with the change in radii of the orbit
D) none of these
Q. An electron of mass M kg and charge ‘e’ columbs travel from rest through a potential difference of V volts. The field energy of electron in joule is
A) MeV
B) eV/M
C) eV
D) e/V
Q. A disc shaped magnet levitage above a superconducting material that has been cooled by liquid nitrogen. this happens because a superconductor is
A) Diamagnetic
B) Nonmagnetic
C) paramagnetic
D) Ferromagnetic
Today Challenging Question
Q. If a boat is moving in upstream with velocity of 14 km/hr and goes downstream with a velocity of 40 km/hr, then what is the speed of the stream ?
A) 13 km/hr
B) 26 km/hr
C) 34 km/hr
D) none of these
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