electronics · 36 seconds
Three quantities in one small circuit.
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What current flows through 2000 ohms at 6 volts?
Illustrations generated with OpenArt. Narration uses free local Kokoro neural voices. Illustrations are visual aids; the written lesson carries the explanation.
For an ohmic resistor at a stable temperature, voltage equals current multiplied by resistance.
V = I × R
A 5-volt source across 1000 ohms gives 0.005 amperes: 5 milliamperes.
5 V / 1000 Ω = 5 mA
Double the resistance while keeping voltage fixed. The current becomes half as large.
2R → I/2
Real parts have limits. Calculate resistor power too: voltage times current. Use low-voltage learning circuits.
P = V × I
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