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Author Question: A 4.0-W resistor has a current of 3.0 A in it for 5.0 min. How many electrons pass through the ... (Read 101 times)

mcmcdaniel

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on: Jul 28, 2018
A 4.0-W resistor has a current of 3.0 A in it for 5.0 min. How many electrons pass through the resistor during this time interval?
 a. 7.5  1021
  b. 5.6  1021
  c. 6.6  1021
  d. 8.4  1021
  e. 2.1  1021

Question 2

A rod of 2.0-m length and a square (2.0 mm  2.0 mm) cross section is made of a material with a resistivity of 6.0  10-8 W  m. If a potential difference of 0.50 V is placed across the ends of the rod, at what rate is heat generated in the rod?
 a. 3.0 W
  b. 5.3 W
  c. 8.3 W
  d. 1.3 W
  e. 17 W


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ebonylittles

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

B

Answer to Question 2

C


mcmcdaniel

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Reply 2 on: Jul 28, 2018
Gracias!

mohan

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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