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
Two waves of the same frequency have opposite phase when the phase angle between them is
A 360°
B 180°
C 90°
D 0°
When a wave is incident from the more dense into a less dense medium at an angle equal to or exceeding the critical angle, the wave suffers total internal __________ .
A Reflection
B Refraction
C Transmission
D None of the above
A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased
A VR > VC
B VC > VR
C VR = VC
D VR and VC = 0
If the input to an integrating circuit is a succession of alternating positive and negative pulses of very short duration, the output will be ___________ wave
A Rectangular
B Triangular
C Sine
D Square
If two sine waves of the same frequency have a phase difference of JT radians, then
A Both will reach their minimum values at the same instant
B Both will reach their maximum values at the same instant
C When one wave reaches its maxi¬mum value, the other will reach its minimum value
D None of the above
A particle moving with a simple harmonic motion, attains its maximum velocity when it passes
A The extreme point of the oscillation
B Through the mean position
C Through a point at half amplitude
D None of these
An inductor and a resistor are in series with a sine wave voltage source. The frequency is set so that the inductive reactance is equal to the resistance. If the frequency is increased, then
A VR = VL
B VL
C VL = VR
D VL > VR
For wave action in dams, the maximum height of freeboard is generally taken to be equal to (where hw is height of wave.)
A 0.5 hw
B 0.75 hw
C 1.25 hw
D 1.50 hw
The frequency of an alternating current is
A The speed with which the alternator runs
B The number of cycles generated in one minute
C The number of waves passing through a point in one second
D The number of electrons passing through a point in one second

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