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Author Question: A transformer consists of a 1000-turn primary coil and a 4000-turn secondary coil. If the current in ... (Read 47 times)

segrsyd

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on: Jul 28, 2018
A transformer consists of a 1000-turn primary coil and a 4000-turn secondary coil. If the current in the secondary is 3.00 A, what is the primary current?
 a. 6.00 A
  c. 48.0 A
  b. 0.750 A
  d. 12.0 A

Question 2

A very loud train whistle has an acoustic power output of 80 W. If the sound energy spreads out spherically, what is the intensity level in dB at a distance of 100 meters from the train? (I0 = 10-12 W/m2)
 a. 78.3 dB
  c. 92.8 dB
  b. 88.0 dB
  d. 95.0 dB


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Expo

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

D

Answer to Question 2

B


segrsyd

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Reply 2 on: Jul 28, 2018
Gracias!

Missbam101

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Reply 3 on: Yesterday
Wow, this really help

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