Q. The manifestation of band structure in solids is a consequence of
A) Pauli's exclusion principle
B) Heisenberg's uncertainity principle
C) Bohr's principle  
D) Ohm's law
Q. one astronomical unit is the average distance between
A) earth and sun
B) earth and the moon
C) Jupiter and the sun
D) Pluto and the sun
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. 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. Superposition of two waves trains of amplitudes and nearly same frequiencies, moving in the same direction, results in the formation of beats. The maximum loudness heard at the waxing is 'n' times the loudness of each of the componet wave trains. the value of n is
A) 1
B) 2
C) 4
D) 8
Q. what is the SI unit of Young modulus of elasticity
A) dyne/cm
B) newton/m
C) newton/m2
D) m2/s
Q. Coins are minted in india in
A) Noida
B) kolkata
C) Mumbai
D) All of the above
Q. early vedic Aryans did not know the use of which of the following metals
A)  iron  
B) bronze  
C)  copper  
D)  gold
Q. How many liters of 27% alcohol solutions is to be added to 20 liters of 36% alcohol solution to obtain a 30% alcohol solution?
A) 30
B) 40
C) 60
D) 50
Q. The saturation current in diode valve depends upon
A) plate voltage
B) temperature of the filament
C) neither a nor b
D) both a and b
Today Challenging Question
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
4 members solved
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