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. Plants that grow in seashores are called as :
A) Halophytes  
B) Hydrophytes  
C)  Xerophytes  
D) Psammophytes
Q. Coins are minted in india in
A) Noida
B) kolkata
C) Mumbai
D) All of the above
Q. Mosquito repellents contain mainly :
A) calcium dihydrogen phosphate  
B)  potassium hydrogen phosphate  
C) sodium hydrogen sulphate  
D) ammonium bicarbonate
Q. When a metal is heated it emits predominantly
A) electrons
B) protons  
C) positrons  
D) neutrons
Q. Boundary line between Pakistan and Afghanistan
A) Radcliffe line
B) Durand line
C) maginot line
D) mcmahon line
Q. an electron moves with a constant velocity V parallel to the direction of uniform magnetic field B. the force experienced by the electron is
A) BeV
B) eV/B
C) B/eV
D) zero  
Q. what is the SI unit of Young modulus of elasticity
A) dyne/cm
B) newton/m
C) newton/m2
D) m2/s
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. The highest waterfall of the world is in
B) Canada
C)  Venezuela
D)  Russia
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
2 members solved
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