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S-6-6-2_Ohm’s Law and KEY Ohm’s Law Practice Problems Current = Voltage or I = Resistance V R Units Symbol Symbol in Ohm’s law equation Voltage volts V V Current amps A I Resistance ohms Ω R Part 1. Directions: Solve each problem below. Show your work. 1. A circuit has a voltage of 25 volts and a 5-ohm resistance. What is the current? 2. A CD player has a resistance of 40 ohms in a circuit that supplies 4 volts. What is the current flowing through this circuit? Part 2. Directions: Answer the questions below. 3. As the voltage in a circuit increases, what happens to the current? 4. As the resistance in a circuit increases, what happens to the current? 5. What would happen to the electrical current in the circuit below if you added another battery and kept everything else the same? Explain your answer. Source: www.eia.doe.gov/energyexplained/images/battery2_small.jpg S-6-6-2_Ohm’s Law and KEY ANSWER KEY Ohm’s Law Practice Problems Part 1. Directions: Solve each problem below. Show your work. 1. A circuit has a voltage of 25 volts and a 5-ohm resistance. What is the current? 5 amps I = 25 volts/5 ohms I = 5 amps 2. A CD player has a resistance of 40 ohms in a circuit that supplies 4 volts. What is the current flowing through this circuit? 0.1 amps I = 4 volts/40 ohms I = 0.1 amps Part 2. Directions: Answer the questions below. 3. As the voltage in a circuit increases, what happens to the current? The current also increases. 4. As the resistance in a circuit increases, what happens to the current? The current decreases. 5. What would happen to the electrical current in the circuit below if you added another battery and kept everything else the same? Explain your answer. The current would increase because the voltage would increase. Source: www.eia.doe.gov/energyexplained/images/battery2_small.jpg