TWO IDENTICAL STRAIGHT WIRES ARE STRETCHED SO AS TO PRODUCE 6 BEATS/S WHEN VIBRATING SIMULTANEOUSLY. ON CHANGING THE TENSION IN ONE OF THEM , BEAT FREQUENCY REMAINS SAME. DENOTING BY T1 AND T2 , THE HIGHER AND THE LOWER INITIAL TENSION IN THE STRING , THEN IT COULD BE SAID THAT WHILE MAKING THE ABOVE CHANGES IN THE TENSION :
1. T2 WAS DECREASED
2. T2 WAS INCREASED
3. T1 WAS INCREASED
4. NONE OF THE ABOVE
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