Does the needle spin in different directions because the flow of electrons is different? Or is it because of something else?

In this situation, the current is flowing in the opposite direction from situation A to situation B. If you watch Sal's videos on magnetism, you will learn that opposite current means opposite magnetic field.

at 0:13 the compass move clockwise.However at 0:26 when the battery changed and the crocodile wire changed its position, the compass move counter clockwise. Why is it so?

Beacuse you've changed the whole current direction, so it caused a change in way. Check right hand rule for more.

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Physics library

Course: Physics library > Unit 18

Lesson 5: Discovery of electromagnetism

Electromagnetic field (forward vs. reverse)

Name: Electromagnetic field (forward vs. reverse)
Uploaded: 2013-05-02T03:38:40Z
Description: Apply current in both directions and notice the response is different.

Google Classroom

Apply current in both directions and notice the response is different. Created by Brit Cruise.

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♦SamuelM♦
Posted 11 years ago. Direct link to ♦SamuelM♦'s post “Does the needle spin in d...”
Does the needle spin in different directions because the flow of electrons is different? Or is it because of something else?
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(6 votes)
Answer
- Ethan Dlugie
  Posted 11 years ago. Direct link to Ethan Dlugie's post “In this situation, the cu...”
  In this situation, the current is flowing in the opposite direction from situation A to situation B. If you watch Sal's videos on magnetism, you will learn that opposite current means opposite magnetic field.
  Comment on Ethan Dlugie's post “In this situation, the cu...”
  (8 votes)
Dashineni Challaya
Posted 10 years ago. Direct link to Dashineni Challaya's post “at 0:13 the compass move ...”
at
0:13
the compass move clockwise.However at
0:26
when the battery changed and the crocodile wire changed its position, the compass move counter clockwise. Why is it so?
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(4 votes)
Answer
- Tuğberk Kaan Duman
  Posted 9 years ago. Direct link to Tuğberk Kaan Duman's post “Beacuse you've changed th...”
  Beacuse you've changed the whole current direction, so it caused a change in way. Check right hand rule for more.
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  (3 votes)
Long Vuong
Posted 10 years ago. Direct link to Long Vuong's post “Why is there tape below t...”
Why is there tape below the compass?
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(3 votes)
Answer
- Vegard Solheim
  Posted 9 years ago. Direct link to Vegard Solheim's post “The tape is there only to...”
  The tape is there only to elevate the compass, so the wire can pass underneath.
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  (1 vote)
Blaze
Posted 8 years ago. Direct link to Blaze's post “At 0:28, is counterclockw...”
At
0:28
, is counterclockwise more powerful? It looks that way from the video.
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(3 votes)
Answer
Jonathan Ziesmer
Posted 9 years ago. Direct link to Jonathan Ziesmer's post “Do electromagnets have no...”
Do electromagnets have north and south poles? I think so but thought I'd check...
And if so, than wouldn't it behave differently than with normal magnets?
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(2 votes)
Answer
josh.410
Posted 8 years ago. Direct link to josh.410's post “why isn't the battery sho...”
why isn't the battery shorting out from this?
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(1 vote)
Answer
Jalen Lau
Posted 9 years ago. Direct link to Jalen Lau's post “What if you DON'T notice ...”
What if you DON'T notice the response is different?
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(2 votes)
Answer
Horse-Lover 🐴
Posted 9 years ago. Direct link to Horse-Lover 🐴's post “How can you make the elec...”
How can you make the electromagnet stronger?
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(1 vote)
Answer
- ifat mirza prova
  Posted 9 years ago. Direct link to ifat mirza prova's post “increasing the amount of ...”
  increasing the amount of current passing through is one way....another is making coils out of the wire so that the magnetic fields are more congested...thus, stronger.
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  (1 vote)
Sarah Brown
Posted 10 years ago. Direct link to Sarah Brown's post “where can I find Sal's vi...”
where can I find Sal's videos on magnetism?
Button navigates to signup pageComment on Sarah Brown's post “where can I find Sal's vi...”
(1 vote)
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Ishita Gupta
Posted 8 years ago. Direct link to Ishita Gupta's post “In which direction does i...”
In which direction does it move clock-wise and in which direction anti-clockwise?
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(1 vote)
Answer

Video transcript

[This video contains no audio narrations.] Caption: clockwise Caption: counterclockwise