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Author Question: If a metallic wire of cross-sectional area 3.0 10-6 m2 carries a current of 9.1 A and has a mobile ... (Read 120 times)

azncindy619

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on: Jul 28, 2018
If a metallic wire of cross-sectional area 3.0  10-6 m2 carries a current of 9.1 A and has a mobile charge density of 4.24  1028 carriers/m3, what is the average drift velocity of the mobile charge carriers? (charge value = 1.6  10-19 C)
 a. 3.4  103 m/s
  c. 4.5  10-4 m/s
  b. 1.7  103 m/s
  d. 1.5  10-4 m/s

Question 2

A rod of length L is hinged at one end. The moment of inertia as the rod rotates around that hinge is ML2/3 . Suppose a 2.50 m rod with a mass of 3.00 kg is hinged at one end and is held in a horizontal position. The rod is released as the free end is allowed to fall. What is the angular acceleration as it is released?
 a. 3.70 rad/s2
  c. 5.88 rad/s2
  b. 7.35 rad/s2
  d. 4.90 rad/s2


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leahchrapun

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Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

C


azncindy619

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Reply 2 on: Jul 28, 2018
Wow, this really help

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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