1. In a phasor representation of a transverse wave on a string, which projection

Question

1. In a phasor representation of a transverse wave on a string, which projection gives the displacement of a point along the string?

a. Vertical projection

b. Horizontal projection

2. To what do the terms node and antinode refer?

a. nodes are points of no oscillation; antinodes are points of maximum oscillation

b. antinodes are points of no oscillation; nodes are points of maximum oscillation

3. For a decrease in the density of a material but without any change in the bulk modulus, what happens to the speed of sound in that material?

a.increases

b.decreases

c.remains the same

4.An airplane is flying faster than the speed of sound at the altitude of the airplane. If the speed of the airplane increases, what happens to the Mach number?

a. increases

b. decreases

c. remains the same

Explanation / Answer

1) correct option is (a)

2) nodes have minimum amplitude, antinode have maximum amplitude

correct option is (a)

3) speed v= (B/p)^0.5

Here B is Bulk modulus, p is density

correct option is (a)

4) correct option is (b)

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