Author Question: Solenoid 1 has a length L, cross-sectional area A, and N turns. Solenoid 2 has a length 2L, ... (Read 151 times)

Melani1276 · **on:** Jul 28, 2018

Solenoid 1 has a length L, cross-sectional area A, and N turns. Solenoid 2 has a length 2L, cross-sectional area 2A, and 2N turns. Which long solenoid has the greater magnetic field at its center when equal currents are going through them?
a. Both have the same magnetic field. b. 1
c. 2
d. Since it depends on the values of A and L, none of the above are correct.

Question 2

A centrifuge rotates at 100 rev/s (i.e., 628 rad/s). If the test tube places the suspension at 10 cm from the axis of rotation, by what factor are the terminal speeds of the settling particles increased as compared to sedimentation cause by gravity?
a. 3.2 103
c. 800
b. 64
d. 4.0 104