An AC power generator produces 100 A (rms) at 3600 V. The voltage ...

[Charlie]

An AC power generator produces 100 A (rms) at 3600 V. The voltage is stepped up to 100,000 V by an ideal transformer, and the energy transmitted through a long-distance power line with a total resistance of 100 W. What is the rms current in the long-distance line?
 a. 3.6 A
  c. 1000 A
  b. 1.0 A
  d. 1.8 A

Question 2

By what amount does the sound intensity decrease when the distance to the source triples?
 a. 9.0 dB
  c. 6.0 dB
  b. 9.5 dB
  d. 3.5 dB

[bubulittle310@msn.cn]

Answer to Question 1

A

Answer to Question 2

B