Wire A and Wire B are each carrying the same current. If the ...

[krzymel]

Wire A and Wire B are each carrying the same current. If the diameter of Wire A is half that of Wire B, how does the drift velocity vdA in Wire A compare to that in Wire B?
 a. vdA = 4 vdB
  c. vdA = vdB /2
  b. vdA = 2 vdB
  d. vdA = vdB /4

Question 2

A solid cylinder (I = MR2/2) has a string wrapped around it many times. When I release the cylinder, holding on to the string, the cylinder falls and spins as the string unwinds. What is the downward acceleration of the cylinder as it falls?
 a. 0
  c. 6.5 m/s2
  b. 4.9 m/s2
  d. 9.8 m/s2

[adammoses97]

Answer to Question 1

A

Answer to Question 2

C