11 NCERT PHYSICS MCQ

Q1. Two tuning forks are struck and the sounds from each reach your ears at the same time. One sound has a frequency of 256 Hz, and the second sound has a frequency of 258 Hz. The underlying beat frequency is: 2.0 Hz 256 Hz 258 Hz 257 Hz Solution The beat frequency is the difference between the two frequencies; f(beat) = 258 Hz - 256 Hz = 2 Hz. Q2. A spectral line of wave length 5000 A.U in the light coming from a distant star is observed to be shifted to 5004 A.U.  The component of the recessional velocity of the star along the line of sight is : 1.4 x 10 5 m/s ...

Q1. If the length of spring is halved, then its force constant becomes Halved Double Thrice Remains same Solution The spring constant/force constant is inversely proportional to the length of the spring. Hence, if the length is halved, the force constant will be doubled. Q2. Equation of a body in S.H.M is x = 5 cos (3πt + π/3). Its amplitude and velocity at t = 2 s would be 40.97 m/s -41.5 m/s -40.79 m/s 40.5 m/s Solution Q3. Amplitude of an oscillator reduce...