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KCET 2011 Physics Solved Paper

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Question : 18

Total: 60

Two tuning forks, A and B, produce notes of frequencies 258‌Hz and 262‌Hz. An unknown note sounded with A produces certain beats. When the same note is sounded with B, the beat frequency gets doubled. The unknown frequency is ....................

250‌Hz
252‌Hz
254‌Hz
256‌Hz

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