IB DP Physics Topic 4 Paper 1 2019

• A.

• B.

• C.

• D.

• A. The particles at X and Y are in phase.

• B. The velocity of the particle at X is a maximum.

• C. The horizontal distance between X and Z is 3.0 m.

• D. The velocity of the particle at Y is 100 m/s.

Monochromatic light is used to produce double-slit interference fringes on a screen. The fringe separation on the screen is y. The distance from the slits to the screen and the separation of the slits are both doubled, and the light source is unchanged. What is the new fringe separation on the screen?

• A. y/4

• B. y

• C. 2y

• D. 4y

• A. 90°, 180°, 270°

• B. 90°, 270°, 450°

• C. 180°, 360°, 540°

• D. 180°, 540°, 720°

A pipe is open at both ends. What is correct about a standing wave formed in the air of the pipe?

• A. The sum of the number of nodes plus the number of antinodes is an odd number.

• B. The sum of the number of nodes plus the number of antinodes is an even number.

• C. There is always a central node.

• D. There is always a central antinode.

A particle performs simple harmonic motion (shm). What is the phase difference between the displacement and the acceleration of the particle?

• A. 0

• B. $\frac{\pi}{2}$

• C. $\pi$

• D. $\frac{3\pi}{2}$

• A.

• B.

• C.

• D.

• A.

• B.

• C.

• D.

Which of these waves cannot be polarized?

• A. microwaves

• B. ultrasound

• C. ultraviolet

• D. X rays

A string fixed at both ends vibrates in the first harmonic with frequency 400 Hz. The speed of sound in the string is 480 m/s. What is the length of the string?

• A. 0.42 m

• B. 0.60 m

• C. 0.84 m

• D. 1.2 m