If you want to learn more about the nature and properties of matter and energy or you're simply preparing for a Physics exam, these Physics past questions and answers are ideal for you.
y = 0.15 sin 200π(x - 5.5t)
y = 0.15 sin π(0.01x - 5.5t)
y = 0.15 sin 5.5π(x - 200t)
y = 0.15 sin π(550x - 0.01t)
Correct answer is A
The general wave equation is given by Y = sin A 2π/λ [x - vt]
= Sin A [(2π X)/λ - (2π vt)/λ]
thus if A = 0.15;λ = 0.01m; f = 550Hz
then V = f x λ = 550 x 0.01 = 5.50m/s
∴ Y = 0.15 sin [(2 x λ x X)/0.01 - (2 x λ x 5.5t)/0.01]
= 0.15 sin[200λX - 200 x λ x 5.5t]
∴ Y = 0.15 sin 200λ[x - 5.5t]
fo/2
2fo
fo/√2
fo√2
Correct answer is D
For a vibrating sonometer wire, the frequency
F = l/2l √(T/m)
and if the length, l and mass per unit length, m, are constant, then Fo ∝ √T => FoK√T or Fo/√T = K
=> F1o/√F1 = F2o/√F2
∴ F1o/√T1 = F2o/√T2
thus F2 = | F3x√(2T1 |
__√T1 |
=
= | Fox√2 x √T1 |
√T1 |
∴F2 = Fo x √2 = Fox√2