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NEET UG PHYSICS MCQ: UNITS & MEASUREMENTS
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Three identical spheres of mass 'm', are placed at the vertices of an equilateral triangle of length 'a'. When released, they interact only through gravitational force and collide after a time T = 4 seconds. If the sides of the triangle are increased to length '2a' and also the masses of the spheres are made '2m', then they will collide after _____ seconds.
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Correct option: A
8
Option A (8) is correct because the time of collision is proportional to the side length of the triangle when the masses are scaled proportionally.
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Statement-II: Cause of random errors are uncertain. An object is moving through the liquid. The viscous damping force acting on it is proportional to the velocity. Then dimension of constant of proportionality is The error due to parallax is a: 2.34 is obtained by rounding of the number The dimensional formula of self-inductance is The dimension of is that of
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