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Author Question: A series LR circuit contains an emf source of 14V having no internal resistance, a resistor, a 34 H ... (Read 34 times)

Starlight

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on: Jul 29, 2018
A series LR circuit contains an emf source of 14V having no internal resistance, a resistor, a 34 H inductor having no appreciable resistance, and a switch.
 
  If the emf across the inductor is 80 of its maximum value 4.0 s after the switch is closed, what is the resistance of the resistor?
  A) 14
  B) 1.9
  C) 1.5
  D) 5.0

Question 2

What resistance should be added in series with a 3.0-H inductor to complete an LR circuit with a time constant of ?
 
  A) 0.75 k
  B) 12
  C) 0.75
  D) 2.5


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Jane

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Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

A


Starlight

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Reply 2 on: Jul 29, 2018
:D TYSM

raili21

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Reply 3 on: Yesterday
Wow, this really help

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