This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A resistor of unknown resistance and a 15- resistor are connected across a 20-V emf in such a way ... (Read 251 times)

rlane42

  • Hero Member
  • *****
  • Posts: 594
on: Jul 28, 2018
A resistor of unknown resistance and a 15- 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
  b. 12
  c. 7.5
  d. 30
  e. 5.0

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
  b. 7.6
  c. 6.9
  d. 8.0
  e. 2.8


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

carlsona147

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 28, 2018
Answer to Question 1

d

Answer to Question 2

a


rlane42

  • Member
  • Posts: 594
Reply 2 on: Jul 28, 2018
:D TYSM

samiel-sayed

  • Member
  • Posts: 337
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

Finding an unknown side of a triangle Finding an unknown side of a triangle
The digital multimeter should be set to read DC volts and the red lead connected to the battery ... The digital multimeter should be set to read DC volts and the red lead connected to the battery ...
Measuring the resistance of a spark plug wire with a multimeter set to the ohms position. The ... Measuring the resistance of a spark plug wire with a multimeter set to the ohms position. The ...
A downward-sloping spark line usually indicates high secondary ignition system resistance or an ... A downward-sloping spark line usually indicates high secondary ignition system resistance or an ...
A digital storage oscilloscope can be easily connected to an injector by carefully back-probing ... A digital storage oscilloscope can be easily connected to an injector by carefully back-probing ...
A buffer solution is prepared using 0.5 moles of a weakly basic drug and an unknown quantity of ... A buffer solution is prepared using 0.5 moles of a weakly basic drug and an unknown quantity of ...
Video: Non-specific disease resistance mechanisms & Skin's defense barriers

For a complete list of videos, visit our video library