PhET Sim: Circuits & Ohm's Law

‪Circuit Construction Kit Open the Simulation: Circuit Construction KitFollow the directions on this Wizer to explore circuits. PhET - Circuit Construction Kit - DC The Circuits Gizmo shows a circuit board and a variety of components.Create circuit as shown below.Turn on Show current and select Electron flow.The moving dots represent a current of electrons—tiny, negatively charged particles—moving through the wire. Voltage is a measure of how much more potential energy an electron at one end of a battery has than an electron at the other end of the battery. How does changing the battery’s voltage affect the current? (Test your circuit)Finish this statement:As the battery's voltage increases,.. the current stays the same. the current increases. the current decreases. How does changing the battery’s voltage affect the brightness of the light? (Test your circuit)Finish this statement:As the battery's voltage increases,.. the bulb stays the same. the bulb dims. the bulb brightens. Activity: Ohm's LawClick Refresh. Create the circuit shown below.Set the resistor to 10-ohms.Click on the battery.Set the selected battery voltage to 10 volts. Resistors are devices that slow the flow of current in a wire. The resistance of the circuit to current is measured in units called ohms. Turn the switch ONto start the flow of current.An ammeter is a device that measures current in Amperes (A).Drag the Ammeter (A) to various parts of the circuit.Is the current the same throughout, or does it change? The current is the same throughout. The current is different throughout. What is the current in the wire now? 0.50 ampere 0.80 ampere 1.00 ampere 1.2 ampere Measure the current in the circuit using the resistor and voltage combinations given below.a) Set the resistor to 20 Ohms in the circuit. Change the battery to the 10 Volts. Use the ammeter to measure the current. Record this in the table.b) Change the voltage on the battery and remeasure the current. Enter the answers as a number to 2 decimal places! Ex)3.10 Voltage (Volts) Resistance (Ohms) Current (Amps) 10 20 0.50 20 20 1.00 40 20 2.00 60 20 3.00 Summarize! If the resistance is kept constant, as the voltage of a battery increases, the current through the circuit is ..... increases. decreases. remains the same. Measure the current in the circuit using the resistor and voltage combinations given below.a) Set the resistor to 20 Ohms in the circuit. Change the battery to the 50 Volts. Use the ammeter to measure the current. Record this in the table.b) Change the resistance on the resistor and remeasure the current. Voltage (Volts) Resistance (Ohms) Current (Amps) 50 20 2.50 50 25 2.00 50 50 1.00 50 100 0.50 Summarize! If the voltage is kept constant, as the resistance of the circuit increases, the current through the circuit ..... increases. decreases. remains the same. ----------------------------------IMPORTANT FORMULA------------------------------------**The mathematical relationship betweenvoltage (V), resistance (R) andcurrent (I)is expressed by the equation: V = I*R called Ohm's Law.Below is the formula triangle for this equation. Examine the diagram below. Note the voltmeter and ammeter measurements.Use Ohm's Law to calculate the resistance of the light bulb. 5 Ω 20 Ω 10.5 Ω 10 Ω What size resistor would produce a 3 Amp current flow with a 12 Volt battery? 1 Ω 3 Ω 4 Ω 12 Ω