Physics Grade 11 HL.
1.
Topic:
Superposition of waves
The two graphs show the variation with time of the individual displacements of two waves as
they pass through the same point.
The displacement of the resultant wave at the point at time T is equal to
A.
x1 + x2 .
B.
x1 – x2 .
C.
A1 + A2.
D.
A1 – A2
2. Two spheres are dipped into the water simultaneously. The spheres oscillate in phase. The diagram
shows some lines in region A along which the disturbance of the water surface is a minimum.
(i) Outline how the regions of minimum disturbance occur on the surface.
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(ii)The frequency of oscillation of the spheres is increased. State and explain how this will affect
the positions of minimum disturbance.
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3.
Two coherent point sources S1 and S2 emit spherical waves.
Which of the following best describes the intensity of the waves at P and Q?
P
Q
A.
maximum
minimum
B.
minimum
maximum
C.
maximum
maximum
D.
minimum
minimum
4. The two wave forms in the diagram are traveling in opposite directions. Draw three diagrams to
show the resultant wave forms when point 0 reaches A, B and C.
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