Q. work function is generally expressed in
A) electron volt
B) joule
C) newton
D) gauss
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. If the universal gravitational constant were decreasing with time, then satellite in orbit would still maintain its
A) Orbital radius
B) Angular momentum
C) Tangential speed
D) period of revolution
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. when a charged particle moves in a transverse magnetic field, it path of motion is
A) parabolic
B) circular
C) elliptical
D) linear
Q. the dimensional representation of plancks constant is same as that of
A) momentum
B) torque
C) gravitational constant
D) angular momentum
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. 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. 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
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
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
8 members solved
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