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Results tagged with ohms-law
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user 193372
A well known relationship that describes the relationship between Voltage and current through a device's resistance expressed mathematically as V= IR. This formula says that voltage across the device is equal to the current through the device multiplied by the resistance.
2
votes
2
answers
126
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Can a power supply be too powerful for a device assuming that the power supply is at operati... [duplicate]
Let’s say a device’s operating voltage is 5V and maximum current that it can draw is 5A.
Is it possible for a 5V power supply to have very low internal resistance such that a device that operates at …
- 149
0
votes
1
answer
844
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Can you calculate internal resistance of battery by shorting it?
Can I measure the current of a battery by shorting the circuit and by ohms-law divide the voltage of the battery by the current measured to get internal resistance?
- 149
0
votes
5
answers
260
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Why can't you just reduce the current instead of the voltage?
Why does voltage even matter, if it's the current that goes through a circuit? I understand the relationship V = IR (I think) and that increasing the voltage (pressure) will increase the current.
H …
- 149
-1
votes
2
answers
632
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Double the voltage did not double the amps?
I have two brand new AA batteries. I measured the voltage and current of each battery and they are both 1.5v and 5A respectively. I connected these same batteries in series and I measured the voltage. …
- 149