Author Question: When you flip a switch to turn on a light, the delay before the light turns on is determined by: a. ... (Read 45 times)

FButt · **on:** Jul 28, 2018

When you flip a switch to turn on a light, the delay before the light turns on is determined by:
a. the speed of the electric field moving in the wire.
b. the drift speed of the electrons in the wire.
c. the number of electron collisions per second in the wire.
d. none of these, since the light comes on instantly.

Question 2

Two spheres, one with the center core up to r = R/2 hollow and the other solid, have the same mass M and same outer radius R. If they are both rolling at the same linear speed, which one has the greater kinetic energy?
a. The both have the same kinetic energy.
b. The hollow one has the greater kinetic energy.
c. The solid one has the greater kinetic energy.
d. More information is needed to choose an answer.