A) Create a working circuit with a battery, a bulb, and a resistor (and wires). Pull...
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A) Create a working circuit with a battery, a bulb, and a resistor (and wires). Pull out the "Voltmeter" and "Ammeter" (the one with the circle and cross-hairs attached) and make some measurements with them. Describe, briefly, how they work and what they measure. Explore what happens if you change the voltage of the battery and the resistance of the resistor and bulb. (Click on the circuit element to make these changes.) There are standard symbols used to draw circuit elements. In this recitation: Wire Circuit 1 L + B₁ Circuit 4 - + Battery Li Circuit 2 B6 + T B2 B3 I + Light Bulb I + Circuit 3 Circuit 5 L2 B4 B7 an Bs B) Consider the 5 circuits shown above. The batteries are all 9 V, the standard for the PHET circuits. The light bulbs labeled "B" are 10 92, the standard for PHET, and the light bulbs labeled "L" are 20 S2. The wires have zero resistance. Without building the circuits, predict which light bulbs will be brightest, which will be dimmest. Rank all the bulbs relative to each other from dimmest to brightest. The bulb brightness depends on the power delivered to the bulb by the electric current. Explain your reasoning. The brightness of the bulbs is determined by the power: P = 1 AV = 1² R = AV² R C) Using the Circuit Simulator, build the five circuits shown above. It will work best if each person in the group creates one or two of the circuits so you can study and compare them. Remember that you can change the resistance of the "L" bulbs by clicking on the bulb and using the slider at the bottom of the simulation. Note: There isn't a "Power Meter" in the simulation, so explain how you will determine the relative brightness of the bulbs. There are multiple ways to do this, so you might try to think up more than one and decide which will be easiest. D) Determine the relative brightness of each, again determined by the power. Which bulb(s) is (are) brightest? Which bulb(s) is (are) dimmest? Does this agree with your prediction? Explain any differences from your predictions. A) Create a working circuit with a battery, a bulb, and a resistor (and wires). Pull out the "Voltmeter" and "Ammeter" (the one with the circle and cross-hairs attached) and make some measurements with them. Describe, briefly, how they work and what they measure. Explore what happens if you change the voltage of the battery and the resistance of the resistor and bulb. (Click on the circuit element to make these changes.) There are standard symbols used to draw circuit elements. In this recitation: Wire Circuit 1 L + B₁ Circuit 4 - + Battery Li Circuit 2 B6 + T B2 B3 I + Light Bulb I + Circuit 3 Circuit 5 L2 B4 B7 an Bs B) Consider the 5 circuits shown above. The batteries are all 9 V, the standard for the PHET circuits. The light bulbs labeled "B" are 10 92, the standard for PHET, and the light bulbs labeled "L" are 20 S2. The wires have zero resistance. Without building the circuits, predict which light bulbs will be brightest, which will be dimmest. Rank all the bulbs relative to each other from dimmest to brightest. The bulb brightness depends on the power delivered to the bulb by the electric current. Explain your reasoning. The brightness of the bulbs is determined by the power: P = 1 AV = 1² R = AV² R C) Using the Circuit Simulator, build the five circuits shown above. It will work best if each person in the group creates one or two of the circuits so you can study and compare them. Remember that you can change the resistance of the "L" bulbs by clicking on the bulb and using the slider at the bottom of the simulation. Note: There isn't a "Power Meter" in the simulation, so explain how you will determine the relative brightness of the bulbs. There are multiple ways to do this, so you might try to think up more than one and decide which will be easiest. D) Determine the relative brightness of each, again determined by the power. Which bulb(s) is (are) brightest? Which bulb(s) is (are) dimmest? Does this agree with your prediction? Explain any differences from your predictions.
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