ASSERTION : When the displacement of a body is directly proportional to the square of the time. Then the body is moving with uniform acceleration. REASON : The slope of velocity-time graph with time axis gives acceleration.
Correct!
Wrong!
ASSERTION : During a turn, the value of centripetal force should be less than the limiting frictional force. REASON : The centripetal force is provided by the frictional force between the tyres and the road.
Correct!
Wrong!
ASSERTION : The work done in bringing a body down from the top to the base along a frictionless inclined plane is the same as the work done in bringing it down the vertical side. REASON : The gravitational force on the body along the inclined plane is the same as that along the vertical side.
Correct!
Wrong!
ASSERTION : In Young’s experiment the fringe width is directly proportional to wavelength of the source used. REASON : When a thin transparent sheet is placed in front of both the slits of Young’s experiment, the fringe width will increase.
Correct!
Wrong!
ASSERTION : As work function of a material increases by some mechanism, it requires greater energy to excite the electrons from its surface. REASON : A plot of stopping potential versus frequency for different metals, has greater slope for metals with greater work functions.
Correct!
Wrong!
ASSERTION : Bohr’s atomic model cannot be used to explain multiple electron species. REASON : It does not take inter-electronic interactions in account.
Correct!
Wrong!
ASSERTION : If a heavy nucleus is split into two medium sized parts, each of the nuclei will have more binding energy per nucleon than the original nucleus. REASON : Joining two light nuclei together to give a single nucleus of medium size means more binding energy per nucleon than the two nucleus.
Correct!
Wrong!
ASSERTION : An n-type semiconductor has a large number of electrons but still it is electrically neutral. REASON : An n-type semiconductor is obtained by doping an intrinsic semiconductor with a pentavalent impurity.
Correct!
Wrong!
ASSERTION : Electromagnetic waves with frequencies smaller than the critical frequencies of ionosphere cannot be used for communication using sky wave propagation. REASON : The refractive index of the ionosphere becomes very high for frequencies higher than the critical frequency.
Correct!
Wrong!
A&R Quiz - Physics (Day-5)
Read more!
Good
Excellent
Share your Results:
