Turn on thread page Beta

Resistance of a Diode watch

    • Thread Starter
    Offline

    6
    ReputationRep:
    Name:  IVGraphDiode.png
Views: 17
Size:  5.0 KB
    This feels like a stupid question, but when the potential difference is 0 or anything below that, what is the resistance of the diode. Initially I thought it would be zero but then that can't be the case, so would it be infinite?
    • Study Helper
    Offline

    21
    ReputationRep:
    Study Helper
    (Original post by AtomicCow)
    Name:  IVGraphDiode.png
Views: 17
Size:  5.0 KB
    This feels like a stupid question, but when the potential difference is 0 or anything below that, what is the resistance of the diode. Initially I thought it would be zero but then that can't be the case, so would it be infinite?
    Yes. An idealised diode passes current in one direction and not the other.

    i.e. the ideal diode has infinite resistance in the reverse biased case and zero resistance in the forward biased case.

    In reality diodes are never ideal as shown by the graph.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: November 5, 2017
Poll
Could you cope without Wifi?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.