THE DATA IS BASED ON THE MATERIALS

TOPIC: How to calculate resistance, current and voltage in Parallel circuits I. OBJECTIVES: Learning Competency: Solve measurement problems Week 5 Current, resistivity, and resistance; Ohm's law e-42. Given an emf source connected to a resistor, determine the power supplied or dissipated by each element in a circuit e-44. Solve problems involving current, resistivity, resistance, and Ohm's law in contexts such as, but not limited to, batteries and bulbs, household wiring, and selection of fuses. II. LESSON OVERVIEW: Parallel circuits DO NOT USE 220 V power source III. A. MATERIALS 1. Use same materials from series circuit board setup IV. APPLICATION: Directions: Construct the circuit board from available materials, recycling is encouraged. a. Cut the plywood according to the dimension 8.5 x 13 inch or equivalent to long bond paper b. Attach a base wood on one end 8.5x2x2 inch (screwed, glued or nailed) c. Mount the battery and lamps on the circuit board in preparation for a parallel connection d. Connect conductors (wire) from the power source (battery- with one wire coming from the positive terminal) going to junction end of the resistors connected in parallel (LED or mini lamps) and another wire from the negative meeting the other junction end of the resistor (LED or mini lamps) (10 pts) A TO D e. Using the resistance obtained for each resistor from the Performance Task 2 and Compute and the equivalent resistance of resistors in parallel using the formula 1 1 R R R2 R3 f. Using the resistance obtained for each resistor from the Performance Task 2, compute the current through resistors 1 to 3 using Ohm's law / = =. The current I from the battery as it reaches the junction, it divides into three parts. Compute the current in each resistor. 1 = I, + 2 + 1; g. What is the power supplied to the circuit if the voltage of the battery and the total current are known. P = IV h. What is the power dissipated in each resistor using P = 12R The potential difference is the same across every resistors. V = V = V2 = V3 j. Similarly, write all answers on small sheet of papers and paste each on particular locations V, I, R, P on the circuit board. (10 pts) k. Take a photograph of your performance task circuit board with labels and print on a long bond paper (5 pts). Take a selfie picture with the circuit board, print and attach at the back of the bond paper (5 pts).I. OBJECTIVES: Learning Competency: Solve measurement problems Week 5 Current, resistivity, and resistance; Ohm's law e-42. Given an emf source connected to a resistor, determine the power supplied or dissipated by each element in a circuit e-44. Solve problems involving current, resistivity, resistance, and Ohm's law in contexts such as, but not limited to, batteries and bulbs, household wiring, and selection of fuses. II. LESSON OVERVIEW: Series circuits DO NOT USE 220 V power source III. A. MATERIALS 1. Circuit board (1/4 inch thick plywood, 8.5 inch width x13 inch length dimension, attach 8.5in by 2x2 inch base wood on one end plus screws or nails) 2. 1 meter electrical wire AWG22 or higher AWG24 etc. 3. 9 Volt consumer battery or lower (for testing only) 4. 3 pcs 3-volt LEDs (or 3 pcs. mini screw in flashlight bulbs with sockets) check the wattage of each bulb in order. 5. Pliers, wire cutters, screwdrivers for mounting wires on sockets 6. Ruler, Calculator, Pen, Paper, glue, paper for labels IV. APPLICATION: Directions: Construct the circuit board from available materials, recycling is encouraged. a. Cut the plywood according to the dimension 8.5 x 13 inch or equivalent to long bond paper R2 b. Attach a base wood on one end 8.5x2x2 inch (screwed, glued or nailed) C. Mount the battery and lamps on the circuit board in preparation for a series connection d. Connect conductors (wire) from the power source (battery- with one wire coming M from the positive terminal) going to one end of the resistor (LED or mini lamps) and another wire from the negative meeting the other end of the resistor (LED or R3 mini lamps) (10 pts). A TO D Measure the length of all conductors (wire). Compute 10 12 16 18 20 22 24 26 28 the resistance of individual wires used from battery to R1, R1 to R2, R2 to R3 and R3 back to battery with the presumption that you used copper wires, and the p of copper is 1.72 x 10-802 m. R = p- The common diameter of wires according to its sizes 0.321MM 2588MM 0.644MM 0.511MM between AWG 10 to AWG 28 are inserted here for 1.291M 2.053 your reference. Approximate proportion f. Compute and the total resistance of all wires using R = R, + R2 + R3 g. Compute Resistance of each bulb. The voltage of battery and the power of each bulb are known upon purchase, and using the formula P = = you can compute for R = h. Compute the current on the circuit using Ohm's law 1 = . But the current I is the same everywhere in the series circuit. i. Compute the power dissipated on each resistor using P = 12 R j. Find the potential drop across all resistors using V = IR k. Write all answers on small sheet of papers and paste each on particular locations V, I, R, P on the circuit board. (10 pts). 1. Take a picture of your performance task circuit board with labels and print on a long bond paper (5 pts). Take a selfie picture with the circuit board, print and attach at the back of the bond paper (5 pts)