In order to read each sector on the spiral of a CD at a constant ____,the disc spins faster when the read-write head is near the center of the disc.
A)rotational velocity
B)linear velocity
C)linear torque
D)rotational momentum

Question

Quizplus · Accepted Answer

The speed at which data is read from a CD depends on its linear velocity, which is constant throughout the disc. Since the distance travelled by each sector is larger near the center of the disc, the disc needs to spin faster to maintain the same linear velocity. Therefore, choice B (linear velocity) is the correct answer.

In Order to Read Each Sector on the Spiral of a CD