A transformer is used to step up the voltage to a power line. If ...

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A transformer is used to step up the voltage to a power line. If the stepped-up voltage is 10 times the original value, by how much will the power loss in the line decrease?
 a. more than 95
  b. between 10 and 20
  c. between 20 and 95
  d. There will be no change since the power into a transformer equals the power out.

Question 2

When two sound waves are out of phase by _____, destructive interference will occur.
 a. 90
  c. 540
  b. 270
  d. 720

[meryzewe]

Answer to Question 1

A

Answer to Question 2

C

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Thank you!

[meryzewe]

Always glad to help...