RRB Technician Grade 3 practice question
A sound wave has a speed of 320 m/s. If the wavelength of the wave is 0.4 m, what is the frequency of this wave?
From a RRB Technician Grade 3 Science practice set · Science
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Correct answer: (B) 800 Hz
Frequency = speed divided by wavelength = 320 divided by 0.4 = 800 Hz.
हिंदी में प्रश्न
एक ध्वनि तरंग की चाल 320 m/s है। यदि तरंग की तरंगदैर्ध्य 0.4 m है, तो इस तरंग की आवृत्ति कितनी है?
उत्तर जाँचने के लिए किसी विकल्प पर टैप करें।
उत्तर और व्याख्या देखें
सही उत्तर: (B) 800 Hz
आवृत्ति = वेग ÷ तरंगदैर्ध्य = 320 ÷ 0.4 = 800 Hz।
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