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प्रश्न
If a string fixed at both ends vibrates in four loops. The wavelength is 10 cm. The length of string is ______.
पर्याय
5 cm
20 cm
30 cm
None of these
MCQ
रिकाम्या जागा भरा
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उत्तर
If a string fixed at both ends vibrates in four loops. The wavelength is 10 cm. The length of string is 20 cm.
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