Physics Circuit Practice Circuit 1 Series Rules 1

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Physics Circuit Practice

Physics Circuit Practice

Circuit 1 Series Rules: 1. 2. 3. 4. All series resistors (R) have the

Circuit 1 Series Rules: 1. 2. 3. 4. All series resistors (R) have the same current (I). All parallel resistors (R) have the same voltage (V). Solve for the most embedded circuit first. Total power should equal the sum of the individual powers First, solve for total resistance by adding up the resistors. 6 V Next, find the total values using V=IR. R 1 R 2 R 3 Total Resistance Voltage Amperage Power 10 1. 43 0. 14 0. 21 22 3. 14 0. 44 42 6 0. 14 0. 86 ohms volts amps watts Next, using the fact that all the resistors in series share the same current, put in the current values. Finally, solve all the other quantities using V=IR and P=IV. Check that the sum of power equals the total power.

Circuit 2 Parallel Rules: 1. 2. 3. 4. 6 V All series resistors (R)

Circuit 2 Parallel Rules: 1. 2. 3. 4. 6 V All series resistors (R) have the same current (I). All parallel resistors (R) have the same voltage (V). Solve for the most embedded circuit first. Total power should equal the sum of the individual powers Solve for total resistance using the product/sum. Rt = 1/(1/10+1/122) = 4. 1Ω Next, solve for all the total values using V=IR R 1 R 2 R 3 Total Resistance Voltage Amperage Power 10 6 0. 6 3. 6 22 6 0. 27 1. 6 4. 1 6 1. 47 8. 8 ohms volts amps watts Next: Using the fact that all resistors in a parallel get the same voltage, solve for all the other quantities. Finally, make sure the sum of powers equals the total power.

Circuit 3 Combination Rules: 1. 2. 3. 4. All series resistors (R) have the

Circuit 3 Combination Rules: 1. 2. 3. 4. All series resistors (R) have the same current (I). All parallel resistors (R) have the same voltage (V). Solve for the most embedded circuit first. Total power should equal the sum of the individual powers Solve Total Resistance First: Rt = Rseries + Rparallel Rt = 22Ω + (1/(1/40+1/20+1/10)) Ω = 27. 7Ω Next: Solve all total values (V, I, P). Finally, solve the rest of the values and check that the sum of power equals the total power. R 1 R 2 40 22 27. 7 20 1. 25 4. 8 6 0. 062 0. 031 0. 216 ohms Amperage 10 1. 25 0. 125 Power 0. 156 0. 079 watts Resistance Voltage Rt=5. 7Ω I=0. 216 A V=IR= 1. 25 V R 3 0. 039 R 4 1. 05 Total 1. 32 volts amps Next: Draw the equivalent Circuit. Next: Solve all series values using the fact that all resistors in series have the same current and that V=IR. Next: Solve the parallel values using the fact that all the voltages are the same. Use I=V/R to solve currents.

Rules: Circuit 4 Combination Practice! 1. 2. 3. 4. All series resistors (R) have

Rules: Circuit 4 Combination Practice! 1. 2. 3. 4. All series resistors (R) have the same current (I). All parallel resistors (R) have the same voltage (V). Solve for the most embedded circuit first. Total power should equal the sum of the individual powers Solve resistance Solve totals, AND series values using V=IR and P=VI Solve embedded circuits, draw equivalent schematic, using the rules for parallel and series R 1 Rt 1=20Ω It 1=0. 1875 A Vt 1= 3. 75 V R 2 R 5 40 3. 75 Amperage 0. 1875 0. 094 Power Voltage 1. 875 0. 35 10 R 4 Resistance 10 R 3 1. 875 0. 35 40 0. 353 Total 22 8. 25 32 ohms 12 volts 0. 375 amps 3. 01 4. 5 watts Solve everything else using V=IR and P=IV Rt 2=10Ω Check your work! Power sum = Power Total I =0. 375 A t 2 Vt 2=IR= 3. 75 V