One Way Plug Key: Definition & Uses

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A one way plug key is a device used to make or break electrical circuits, often found in educational settings like classrooms and labs. It operates by inserting or removing a key to control current flow, with the position of the key determining whether the circuit is open or closed. While some users sought clarification on positive and negative terminals, it was noted that switches typically do not have these designations. Discussions also touched on the potential for confusion regarding the device's function and wiring, with references made to related concepts like Wheatstone bridges. Overall, the one way plug key serves a fundamental role in circuit experimentation and learning.
  • #31
No. They are binding posts for connecting your wires to the switch terminals.

The gaps are the spaces between the metal blocks. The gaps prevent current flowing from block to block unless a key plug is inserted to bridge the gap.
 
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  • #32
What are metal blocks in 2 way plug key?
 
  • #33
upload_2015-2-10_22-9-38.png
 
  • #34
Are my 33rd and 27th posts correct?
 
  • #35
gracy said:
Are my 33rd and 27th posts correct?
Yes.
 
  • #36
In my practical we are told to connect these gaps ,how can we connect gaps?
 
  • #37
gracy said:
In my practical we are told to connect these gaps ,how can we connect gaps?
See post #22.

Edit: Sorry, I meant post number 31.
 
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  • #38
(wheatstone)?Gaps are connected like wheatstone bridge?
 
  • #39
gracy said:
(wheatstone)?Gaps are connected like wheatstone bridge?
The Wheatstone reference was due to the schematic symbol in question on the tiny, fuzzy image reminding me of a typical Wheatstone bridge setup.

I now realize that it's meant to represent a switching arrangement comprised of your Plug Key Switches (PKS's). So forget the Wheatstone.

Apparently you're meant to use the provided PKS's in the wiring up of your lab circuit. You'll have to figure out the wiring arrangement that makes the plug key switches accomplish the required reversal of the polarity of one of the cells.
 
  • #40
gneill said:
Apparently you're meant to use the provided PKS's in the wiring up of your lab circuit. You'll have to figure out the wiring arrangement that makes the plug key switches accomplish the required reversal of the polarity of one of the cells.
Is this answer of my 36th post?
 
  • #41
gracy said:
Is this answer of my 36th post?
Your 36th post asked how to connect the gaps. That's easy: insert a plug key into the gap.

My previous response was to your question:

(wheatstone)?Gaps are connected like wheatstone bridge?
 

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