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FIND CURRENT AND POWER USED BY R 1 SHOW ALL WORK

1. CONST 150 HOMEWORK#1 SOLUTIONS. FIND CURRENT AND POWER USED BY R 1 SHOW ALL WORK. USE OHM’S LAW TO FIND CURRENT FLOWING THRU R 1. R 1 = 10K Ω. 10V. FIND POWER USED BY R1 WE CAN SOLVE BY USING EITHER:. OR USING:. FIRST USING:. 2. CONST 150 HOMEWORK#1 SOLUTIONS.

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FIND CURRENT AND POWER USED BY R 1 SHOW ALL WORK

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  1. 1. CONST 150 HOMEWORK#1 SOLUTIONS FIND CURRENT AND POWER USED BY R1 SHOW ALL WORK USE OHM’S LAW TO FIND CURRENT FLOWING THRU R1 R1= 10KΩ 10V FIND POWER USED BY R1 WE CAN SOLVE BY USING EITHER: OR USING: FIRST USING:

  2. 2. CONST 150 HOMEWORK#1 SOLUTIONS FIND VOLTAGE AND POWER USED BY R1 SHOW ALL WORK I=5mA R1 10V Since this is a series circuit with only one load R1 The source (10V) and load R1 voltages are the same. To solve for the power used by R1.

  3. 3. CONST 150 HOMEWORK#1 SOLUTIONS FIND TOTAL POWER USED BY THE 50Ω RESISTOR SHOW ALL WORK. GIVEN 10V R1= 50Ω I=200mA You can solve this problem 2 ways, by using either P=IV or P=I²R

  4. 4. CONST 150 HOMEWORK#1 SOLUTIONS FIND THE POWER USED BY THIS 8Ω SPEAKER WHICH IS POWERED BY A 20VDC BATTERY SHOW ALL WORK

  5. 5. CONST 150 HOMEWORK#1 SOLUTIONS • Three resistors are connected to a 10-V battery as shown in the diagram above. What is the current through the 2.0 Ω resistor? • 0.25 A • 0.50 A • 1.0 A • 2.0 A • 4.0 A SHOW ALL WORK SINCE THIS IS A SERIES CIRCUIT, 10V 10Ω IN SERIES CIRCUIT CURRENT IS THE SAME IN EACH ELEMENT. JUST SOLVE FOR IT USING OHM’S LAW AND WE HAVE THE ANSWER. CORRECT ANSWER IS C

  6. 6. CONST 150 HOMEWORK#1 SOLUTIONS • A 100 Ω, 120 Ω, and 150 Ω resistor are connected to a 9-V battery in the circuit shown above. Which of the three resistors dissipates the most power? • the 100 Ω resistor • the 120 Ω resistor • the 150 Ω resistor • both the 120 Ω and 150 Ω • all dissipate the same power

  7. 6. SOLUTION FOR PROBLEM 6 SINCE THE 2 RESISTORS ARE IN PARALLEL (120Ω and 150Ω) SOLVE FOR THE COMBINED RESISTANCE USING ; RT 9V SOLVE FOR IT: 100Ω RESISTOR USES THE MOST POWER 0.25WATTS CORRECT ANSWER IS A CONST 150 HOMEWORK#1 SOULTIONS

  8. 7. CONST 150 HOMEWORK#1 SOLUTIONS IT=I1=I2+I3 FIND I2,I3 ,RT SHOW WORK

  9. 7. SOLUTION FOR PROBLEM 7 TREAT THIS CIRCUIT AS SERIES- PARALLEL. FIRST FIND COMBINED RESISTANCE FOR THE 2 RESISTORS IN PARALLEL, IN A SERIES CIRCUIT ALL THE RESISTORS HAVE THE SAME CURRENT. SO, FIND RT, THEN USE OHM’S LAW TO FIND IT CONST 150 HOMEWORK#1 SOULTIONS

  10. 8. CONST 150 HOMEWORK#1 SOULTIONS HOW MUCH WILL IT COST TO RUN A 100W INCANDESCENT LIGHT BULB FOR 30 DAYS ? YOU ARE BILLED AT 3¢ PER KILOWATT-HOUR. 30DAYSX24HRS=720 HRSX100W=72,000WATT-HOUR $ HOW MUCH WILL IT COST TO RUN A EQUIVALENT 10W LED LIGHT BULB FOR 30 DAYS ? 30DAYSX24HRS=720 HRSX10W=7,200WATT-HOUR ¢

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