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Author Question: A current carrying loop of wire lies flat on a table top. When viewed from above, the current moves ... (Read 120 times)

azncindy619

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on: Jul 29, 2018
A current carrying 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, outside 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 DC motor of internal resistance 6.0  is connected to a 24-V power supply. The operating current is 1.0 A.
 
  (a) What is the start-up current? (b) What is the back emf when the motor is running at full speed? (c) What is the back emf when the motor is running at half speed?


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Amiracle

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

D

Answer to Question 2

(a) 4.0 A
(b) 18 V
(c) 9.0 V


azncindy619

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Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

Joy Chen

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Reply 3 on: Yesterday
:D TYSM

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