Answer for Question An oscillator makes 360 vibrations in 3 minutes.. is given below:
So, no of vibrations in one minute is 120.(b) Similarly, 3 minutes = 180 secondsNo of vibrations in one second is 
So, the no of vibrations in one second is 2.(c) Time period of the wave is given by : 
The time period of the wave is 0.5 s(d) The no of vibation per second is called as its frequency. 
Hence, this is the required solution..
Q.) An oscillator makes 360 vibrations in 3 minutes.
Correct Answer isExplanation :It is given that an oscillator makes 360 oscillations in 3 minutes. (a) Using unitary method :No. of vibrations in one minute is, So, no of vibrations in one minute is 120.(b) Similarly, 3 minutes = 180 secondsNo of vibrations in one second is So, the no of vibrations in one second is 2.(c) Time period of the wave is given by : The time period of the wave is 0.5 s(d) The no of vibation per second is called as its frequency. Hence, this is the required solution.
Conclusion:
This correct answer to this statement is Explanation :It is given that an oscillator makes 360 oscillations in 3 minutes. (a) Using unitary method :No. of vibrations in one minute is, So, no of vibrations in one minute is 120.(b) Similarly, 3 minutes = 180 secondsNo of vibrations in one second is So, the no of vibrations in one second is 2.(c) Time period of the wave is given by : The time period of the wave is 0.5 s(d) The no of vibation per second is called as its frequency. Hence, this is the required solution..