Two speakers emit the same sound wave, identical frequency, wavelength, and amplitude. What other quantity would be necessary to
determine if constructive or destructive interference occurs at a particular point some distance from the speakers?
1 answer:
Answer:
Phase Difference
Explanation:
When the sound waves have same wavelength, frequency and amplitude we just need the phase difference between them at a particular location to determine whether the waves are in constructive interference or destructive interference.
Interference is a phenomenon in which there is superposition of two coherent waves at a particular location in the medium of propagation.
When the waves are in constructive interference then we get a resultant wave of maximum amplitude and vice-versa in case of destructive interference.
- For constructive interference the waves must have either no phase difference or a phase difference of nλ, where n is any natural number.
- For destructive interference the waves must have a phase difference of n×0.5λ, where n is any odd number.
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Answer:
6.88 mA
Explanation:
Given:
Resistance, R = 594 Ω
Capacitance = 1.3 μF
emf, V = 6.53 V
Time, t = 1 time constant
Now,
The initial current, I₀ =
or
I₀ =
or
I₀ = 0.0109 A
also,
I =
here,
τ = time constant
e = 2.717
on substituting the respective values, we get
I =
or
I =
or
I = 0.00688 A
or
I = 6.88 mA