Related Questions

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
An oscilloscope indicates
A Peak to peak value of voltage
B DC value of voltage
C RMS value
D Average value
The writing speed of fast storage oscilloscope is
A 2000 cm/s
B 1000 cm/s
C 1500 cm/s
D 2500 cm/s
Storage oscilloscope operates on the principle of
A Primary emission
B Deflection
C Secondary emission
D Diffusion
On oscilloscope screen for dynamic measurement, lissajous diagram is normally used to determine the __________ of the input signal.
A Frequency
B Amplitude
C Damping
D None of these
The higher the wind speed and the longer the fetch or distance of open water across which the wind blows and waves travel, the ____ waves and the ____ energy they process.
A larger, more
B larger, less
C smaller, more
D smaller, less
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
Why does the ionosphere of the Earth's atmosphere facilitate radio communication? i. The presence of ozone causes the reflection of radio waves to earth ii. Radio waves have a very long wavelength
A i only
B ii only
C both i & ii
D neither i nor ii
Sound waves are ------ waves.
A transverse
B Electromagnetic
C Longitudinal
D one of these
sounds waves are -- waves
A transverse
B Electromagnetic
C Longitudinal
D none of these

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