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Jacklong Posted 13 years ago
Grammar

Which word or phrase can express ΔU?

I don't know which word or phrase have the meaning that the voltage changes from one point to another point, for example, the voltage of the potentiomter changes from 20V to 10V, ?U=20V-10V.
So which word or phrase can express the ?U? Can I just use "voltage change"?
The meaning in Chinese is "dian ya bian hua liang".

I will be very appreciated for any help from you.
  

Top answer

Potential difference.

— Anonymous

  • Potential difference.
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6 Answers
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Potential difference.
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"Potential difference" is another term for voltage, it is not a change in voltage. Use "change in voltage" or "delta U" (whatever "U" is). "Voltage" is actually a layman's term, though. "Change in potential" is more technical.
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enoon"Potential difference" is another term for voltage, it is not a change in voltage. Use "change in voltage" or "delta U" (whatever "U" is). "Voltage" is actually a layman's term, though. "Change in potential" is more technical.
Use "voltage drop".
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"Voltage drop" is what you get across an impedance. It is the difference between the potential on one side of an impedance and the other. That probably is what the OP means by "the voltage of the potentiometer", now that you mention it.
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"the voltage of the potentiometer" changes according to the position of a pin in potentiometer, the voltage changes when the pin moves up or down. so if the initial voltage is 10V, the pin moves up, the voltage changes to 20V, so the voltage changes 10V. So can I still use "voltage drop"?
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jacklong"the voltage of the potentiometer" changes according to the position of a pin in potentiometer, the voltage changes when the pin moves up or down. so if the initial voltage is 10V, the pin moves up, the voltage changes to 20V, so the voltage changes 10V. So can I still use "voltage drop"?
No. The voltage drop changes from 10 to 20, if the voltage measu
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