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Author Question: A 4.0-mH coil carries a current of 5.0 A. How much energy is stored in its magnetic field? A) 10 ... (Read 52 times)

piesebel

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on: Jul 29, 2018
A 4.0-mH coil carries a current of 5.0 A. How much energy is stored in its magnetic field?
 
  A) 10 mJ B) 2.0 mJ
  C) 20 mJ D) none of the given answers

Question 2

A capacitor C is connected in series with a resistor R across a battery and an open switch. If a second capacitor of capacitance 2C is connected in series with the first one, the time constant of the new RC circuit will be
 
  A) smaller than before. B) larger than before.
  C) the same as before. D) variable.
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Sammyo

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

D

Answer to Question 2

A


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