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Author Question: A current carrying circular loop of wire lies flat on a table top. When viewed from above, the ... (Read 110 times)

jho37

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on: Jul 29, 2018
A current carrying circular loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense.
 
  What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field A)
 
  circles the loop in a clockwise direction.
  B)
 
  circles the loop in a counterclockwise direction.
  C)
 
  points straight up.
  D)
 
  points straight down.
  E)
 
  points toward the east.

Question 2

A power transmission line 50 km long has a total resistance of 0.60 . A generator produces 100 V at 70 A.
 
  In order to reduce energy loss due to heating of the transmission line, the voltage is stepped up with a transformer with a turns ratio of 100:1. (a) What percentage of the original energy would be lost if the transformer were not used? (b) What percentage of the original energy is lost when the transformer is used?


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chereeb

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

C

Answer to Question 2

(a) 42
(b) 0.0042


jho37

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Reply 2 on: Jul 29, 2018
Great answer, keep it coming :)

Dominic

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Reply 3 on: Yesterday
Wow, this really help

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