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Results tagged with ohms-law
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user 56411
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
Accepted
Why isn't Ohm's law working for this simple circuit?
Based on your voltage measurement, it looks like your resistor is about 38 ohms, not 332,000 ohms. The current limit on your ExTech multimeter is 200 mA according to the datasheet. The meter is showin …
- 22.3k
4
votes
Accepted
Basic Circuit Analysis using Kirchhoff and Ohm's Laws
It looks like you got confused by the polarity of \$v_1\$. You can define a voltage to be whatever polarity you want, but that's just a notation thing. The physical polarity of the voltage across the …
- 22.3k
15
votes
Why are these readings violating ohm's law? (Are they?)
Helloworld922's answer is correct and quite good, but I thought it might help you to directly answer your questions one at a time.
Using the multimeter to read the battery voltage (with nothing co …
- 22.3k
9
votes
Accepted
Ohm's Law confusion -- can there be voltage without current?
Your estimate is off by several orders of magnitude. Wikipedia gives the resistivity of air as being around \$10^{16}\ \Omega \cdot m\$. I'd guess an actual resistance between two points would be at l …
CommunityBot
- 1
5
votes
Accepted
How do voltage, resistance and amperage work? (In DC circuits)
Half the point of using voltage, current, and resistance is that we don't have to care about what the power supply and resistor are made of. Whether you're using eight 1.5 volt AA batteries in series …
- 22.3k