Phys 226 Resistor Circuits

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Last updated 5:16 AM on 6/25/26
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9 Terms

1
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V=IR

Voltage (Volts) = Current (Ampere) x Resistance (Ω ohms)

2
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combining series resistors

Req = R1 + R2 + R3 + …

3
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combining parallel resistors

1/Req = 1/R1 + 1/R2 + 1/R3 + …

4
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How to start VIR table

  1. reduce the circuit to Req

  2. fill out battery voltage

  3. resistors in series → I1=I2=Ieq

  4. resistors in parallel → V1=V2=Veq

5
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P=IV OR P=I²R OR P=V²/R

used whe asked for rate, power, heat loss, or rate energy is lost

6
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If resistors are parallel, what do we know about the VIR table

V1=V2=Veq

7
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If resistors are in series, what do we know about the VIR table

I1=I2=Ieq

8
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Loop law

resistors in series have the same I (current, Ampere)

9
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Branch law`

resistors in parallell have the same V (voltage, volts)