BITSAT Practice Test - 10 - JEE MCQ
30 Questions MCQ Test - BITSAT Practice Test - 10
The ratio of the longest to shortest wavelengths in Brackett series of hydrogen spectra is
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A double charged lithium atom is equivalent to hydrogen whose atomic number is 3. The wavelength of required radiation for emitting electron from first to third Bohr orbit in Li⁺⁺ will be (Ionisation energy of hydrogen atom is 13.6 eV)
A photo cell is illuminated by a source of light which is placed at a distance d from cell. If distance becomes d/2, then number of electrons emitted per second will
Three point charges -q, Q and -q are placed at equal distances on a straight line. If total potential energy of the system is zero, then the ratio of Q/q is
Three capacitors of capacitances 1 μF, 2 μF and 4 μF are connected first in a series combination, and then in a parallel combination. The ratio of their equivalent capacitances will be
On a rough horizontal surface, a body of mass 2 kg is given a velocity of 10 m/s. If the coefficient of friction is 0.2 and g=10 m/s2, the body will stop after covering a distance of
A black body radiates 20 W at temperature 227oC. If temperature of the black body is changed to 727oC then its radiating power will be
Work done in turning a magnet of magnetic moment M by an angle of 90o from the magnetic meridian is n times the corresponding work done to turn through an angle of 60o, where n is
A body is projected at such an angle that the horizontal range is three times the greatest height. The angle of projection is
The parametric equations of a curve traced by a projectile on a certain planet with no surrounding are given by :y = (8t-5t2) metre and x = 6t metre, where t is in seconds. The velocity with which the projectile is projected, is
A man is standing on a weighing machine placed in a lift. When stationary his weight is recorded as 40 kg. If the lift is accelerated upwards with an acceleration of 2 m/s2, then the weight recorded in the machine will be (g=10m/s2)
In a spectrometer experiment three prisms A, B, C with same angle of prism but of different materials of refractive indices μ A = 1.33 , μ B = 1.55 and μ C = 1.44 are used. The corresponding angles of minimum deviation D A , D B , D C measured will be such that
The linear acceleration of centre of gravity of a ball which rolls down without slipping over an inclined plane with an angle of inclination of 30o will be
A meter stick is held vertically with one end on the floor and is then allowed to fall. If the end touching the floor is not allowed to slip, the other end will hit the ground with a velocity of (g = 9.8 m/s2)
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