Chapter 18. Relationship among potential difference, current, and resistance (18-9)

Question

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{"title":"Potential difference between the ends of a wire","description":"Correct!","type":"correct","color":"#99CCFF","code":"[{\"shape\":\"poly\",\"coords\":\"82,133\"},{\"shape\":\"rect\",\"coords\":\"10,16,12,16\"},{\"shape\":\"poly\",\"coords\":\"144,22\"},{\"shape\":\"rect\",\"coords\":\"7,3,46,55\"}]"} {"title":"Resistance of the wire","description":"Wrong","type":"incorrect","color":"#ffcc00","code":"[{\"shape\":\"rect\",\"coords\":\"125,10,158,52\"}]"} {"title":"Current in the wire","description":"Incorrect","type":"incorrect","color":"#00ff00","code":"[{\"shape\":\"rect\",\"coords\":\"103,9,124,53\"}]"}

Question

LsqHLTAZ/w72hDYwcNg7vZqWYdo0YNv53FPsdwDXcEbYsxPeXm4nXjLM78g=

{"title":"Potential difference between the ends of a wire","description":"Incorrect","type":"incorrect","color":"#99CCFF","code":"[{\"shape\":\"poly\",\"coords\":\"82,133\"},{\"shape\":\"rect\",\"coords\":\"10,16,12,16\"},{\"shape\":\"poly\",\"coords\":\"144,22\"},{\"shape\":\"rect\",\"coords\":\"7,3,46,55\"}]"} {"title":"Resistance of the wire","description":"Correct!","type":"correct","color":"#ffcc00","code":"[{\"shape\":\"rect\",\"coords\":\"125,10,158,52\"}]"} {"title":"Current in the wire","description":"Incorrect","type":"incorrect","color":"#00ff00","code":"[{\"shape\":\"rect\",\"coords\":\"103,9,124,53\"}]"}

Question

Tsm8Yyr765b5sqyY/kO3IlhadTYfZXI0MPyiUnLrrCYjjXJhtX1gSQ==

{"title":"Potential difference between the ends of a wire","description":"Incorrect","type":"incorrect","color":"#99CCFF","code":"[{\"shape\":\"poly\",\"coords\":\"82,133\"},{\"shape\":\"rect\",\"coords\":\"10,16,12,16\"},{\"shape\":\"poly\",\"coords\":\"144,22\"},{\"shape\":\"rect\",\"coords\":\"7,3,46,55\"}]"} {"title":"Resistance of the wire","description":"Wrong","type":"incorrect","color":"#ffcc00","code":"[{\"shape\":\"rect\",\"coords\":\"125,10,158,52\"}]"} {"title":"Current in the wire","description":"Correct!","type":"correct","color":"#00ff00","code":"[{\"shape\":\"rect\",\"coords\":\"103,9,124,53\"}]"}

Review

Equation 18-9 says the potential difference, or voltage, \(V\) required to produce a current \(i\) in a wire is proportional to \(i\) and to the resistance of the wire. The greater the resistance, the greater the voltage required for a given current.