# 2 50 40 30 1 j a 20 10 0 resistor summary series

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Unformatted text preview: IR ∝ A 50 40 80 60 40 30 20 20 10 0 0 A2 = 4 A1 ⇒ V2 = 1 V1 4 L2 = 2 L1 ⇒ V2 = 2V1 Preflight 12 BB 70 I J≡ A Same Current 60 J1 = J 3 = 2 J 2 50 40 30 1 J∝ A 20 10 0 Resistor Summary Series Parallel R1 R1 R2 R2 Wiring Each resistor on the same wire. Each resistor on a different wire. Voltage Different for each resistor. Vtotal = V1 + V2 Same for each resistor. Vtotal = V1 = V2 Current Same for each resistor Itotal = I1 = I2 Different for each resistor Itotal = I1 + I2 Increases Decreases 1/Req = 1/R1 + 1/R2 Resistance R = R + R eq 1 2 Adding capacitors and adding resistors is “opposite” Preflight 6 100 80 60 40 20 0 R2 in series with R3 Current through R2 and R3 is the same I 23 = V R2 + R3 R1 = R2 = R3 = R Preflight 7 Preflight 7 Compare the current through R1 with the current through R2 I1/I2 = 1/2 I1/I2 = 1/3 I1/I2 = 1 Preflight 9 Compare the voltage across R2 with the voltage across R3 V2 > V3 V2 = V3 = V I1/I2 = 2 V2 = V3 < V I1/I2 = 3 V2 < V3 Preflight 10 Compare the voltage across R1 with the voltage across R2 V1 = V2 = V V1 = ½ V2 = V V1 = 2V2 = V V1 = ½ V2 = 1/5 V V1 = ½ V2 = ½ V 60 50 BB 40 30 20 10 0 R1 = R2 = R3 = R Preflight 7 Preflight 7 Compare the current through R1 with the current through R2 A I1/I2 = 1/2 B I1/I2 = 1/3 C I1/I2 = 2 E I1/I2 = 3 V R2 + R3 I1 = I 23 R2 + R3 R1 I1/I2 = 1 D We know: I 23 = Similarly: I1 = V R1 I1 R2 + R3 = =2 I 23 R1 BB 60 50 40 30 R1 = R2 = R3 = R 20 10 Preflight 9 Compare the voltage across R2 with the voltage across R3 0 Consider loop V23 = V A V2 > V3 B V2 = V3 = V V23 = V2 + V3 C V2 = V3 < V R2 = R3 ⇒ V2 =...
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