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Author Question: A resistor of unknown resistance and a 15-W resistor are connected across a 20-V emf in such a way ... (Read 354 times)

dejastew

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  • Posts: 562
on: Jul 28, 2018
A resistor of unknown resistance and a 15-W resistor are connected across a 20-V emf in such a way that a 2.0 A current is observed in the emf. What is the value of the unknown resistance?
 a. 75 W
  b. 12 W
  c. 7.5 W
  d. 30 W
  e. 5.0 W

Question 2

When a 20-V emf is placed across two resistors in series, a current of 2.0 A is present in each of the resistors. When the same emf is placed across the same two resistors in parallel, the current through the emf is 10 A. What is the magnitude of the greater of the two resistances?
 a. 7.2 W
  b. 7.6 W
  c. 6.9 W
  d. 8.0 W
  e. 2.8 W


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johnpizzaz

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

D

Answer to Question 2

A


dejastew

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  • Posts: 562
Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

xiaomengxian

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Reply 3 on: Yesterday
Wow, this really help

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