InterviewSolution
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InterviewSolution
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Mark the correct statementsA. If all the particle of a string are oscillating in same phase , the string is resonating in its fundamental toneB. To observe interference , two sources of same frequency must be placed some distance apart from each otherC. To observe beats , two sources of same amplitude must be placed some distance apart from each otherD. None of the above |
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Answer» Correct Answer - A::B In case of a stationary wave , all the particles lying between two consecutive nodes , oscillate in the same phase . Since all the particles of given string are oscillating in the same phase , therefore , all the particles of the string lie between two consecutive nodes . Hence , the string is oscillating in the single loop . It means ,it is oscillating in its fundamental tone . Hence , option (a) is correct. Interference is a phenomenon of obtaining constant intensity at a fixed position but the intensity varies with position of the point to point . Hence , to observe interference , two sources having same frequency must be placed some distance apart . Hence option (b) is correct. Beats is a phenomenon of obtaining an intensity which varies with time . To obtain beats , two sources having different frequencies are required . Therefore , option ( c) is wrong. |
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