CSAT Prelims Physics - General Knowledge Questions and Answers for UPSC Exam | Page-3

21 Optical fiber works on the principle of:

22 Three identical vessels A, B and C are filled water, mercury and kerosene respectively up to an equal height. The three vessels are provided with identical taps at the bottom of the vessels. If the three taps are opened simultaneously, then which vessel is emptied first ?

23 Which one of the following is the correct sequence of the given substances in the decreasing order of their densities ?

24 Consider the following statements: A simple pendulum is set into oscillation. Then:

25 A girl is swinging on a swing in sitting position. When the girl stands up, the period of swing will:

26 Who among the following anticipated Newton by declaring that all things gravitate to the earth ?

27 Which one of the following is a vector quantity ?

28 Consider the following features of newer models of motor cars:

29 The working principle of a washing machine is:

30 If the radius of earth were to shrink by one percent, its mass remaining the same, the value of g on the earth’s surface would: