Related Questions

Ultrasonic waves are beyond the range of sound a human can hear.
A outside
B with
C over
D around
দুটি সুসঙ্গত উৎস থেকে λ দৈর্ঘ্যের দুটি তরঙ্গ সমদশায় বের হয় । একটি বিন্দুতে যেখানে তরঙ্গ দুটি মিলিত হয় সেখানে তাদের দশা পার্থক্য 90° । তরঙ্গ দুটির অতিক্রান্ত পথ পার্থক্য তখন কত ? ( Two coherent sources emit waves of wavelength λ which are in phase. which are in phase. The two waves meet at a point where they have a phase difference of 90°. Which of the following could be the traversed path difference between the waves?)
A 2λ
B λ
C λ/2
D λ/4
Sound waves are ------ waves.
A transverse
B Electromagnetic
C Longitudinal
D one of these
Which of the following statements is correct about sound waves and light waves?
A Both transverse waves
B Both longitudinal waves
C Sound waves are transverse waves and light waves are longitudinal waves
D Sound waves are longitudinal and light waves are transverse waves
Human beings hearing range is ________
A 50 to 50,000 Hz
B 40 to 40,000 Hz
C 30 to 30,000 Hz
D 20 to 20,000 Hz
The lower and upper cut off frequencies are also called ___________ frequencies
A Sideband
B Resonant
C Half-resonant
D Half-power
A band-stop filter passes frequencies between its lower and upper critical frequencies and rejects all others.
A True
B False
Frequencies above ___________ kHz are called radio frequencies
A 2
B 10
C 50
D 200
audible means
A can be heart
B can be watched
C can be discerned
D can be felt
Which organ in the world audible associated with?
A ears
B bone
C bands
D eyes

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