![The circuit shown is of a post office box while using it for measuring the unknown resistance. All the keys except the two 100 ohms in the first row and both 2 The circuit shown is of a post office box while using it for measuring the unknown resistance. All the keys except the two 100 ohms in the first row and both 2](https://www.vedantu.com/question-sets/0e5ca896-defd-4ba6-af5c-fd0f9883857f1665689870790615820.png)
The circuit shown is of a post office box while using it for measuring the unknown resistance. All the keys except the two 100 ohms in the first row and both 2
![Adamstown Borough looks for answers after P.O. box fees more than double [Lancaster Watchdog] | Local News | lancasteronline.com Adamstown Borough looks for answers after P.O. box fees more than double [Lancaster Watchdog] | Local News | lancasteronline.com](https://bloximages.newyork1.vip.townnews.com/lancasteronline.com/content/tncms/assets/v3/editorial/7/79/779c9418-a735-11ed-a331-c74fff3e24f8/63e2ce680663b.image.jpg?resize=779%2C500)
Adamstown Borough looks for answers after P.O. box fees more than double [Lancaster Watchdog] | Local News | lancasteronline.com
![Update: Wellesley post office fishing scam & what's up with all the new mailboxes - The Swellesley Report Update: Wellesley post office fishing scam & what's up with all the new mailboxes - The Swellesley Report](https://media.theswellesleyreport.com/wp-content/uploads/2019/11/12231708/new-wellesley-mailbox-e1574718082201-750x1000.jpg)
Update: Wellesley post office fishing scam & what's up with all the new mailboxes - The Swellesley Report
![Post Office box wheatstone bridge for line and other resistance measurements | Science Museum Group Collection Post Office box wheatstone bridge for line and other resistance measurements | Science Museum Group Collection](https://coimages.sciencemuseumgroup.org.uk/images/362/84/medium_SMG00181758.jpg)
Post Office box wheatstone bridge for line and other resistance measurements | Science Museum Group Collection
![Post Office Boxes Mail PO Box Unit - Brass Gold Doors - Bar Wine Holder Cabinet - Cubby Sorter Organizer - Industrial 30 slot with Keys #4 | Schooner Chandlery Post Office Boxes Mail PO Box Unit - Brass Gold Doors - Bar Wine Holder Cabinet - Cubby Sorter Organizer - Industrial 30 slot with Keys #4 | Schooner Chandlery](https://media.schoonerchandlery.com/wp-content/uploads/2020/03/30065512/il_794xN.1465516920_7oxh.jpg)