A circuit with two resistors in series and a voltage source has a total resistance of 15 ohms. If a third resistor is added in series, the new total resistance is 25 ohms. What is the resistance of the third resistor?
Q1. A circuit with two resistors in series and a voltage source has a total resistance of 15 ohms. If a third resistor is added in series, the new total resistance is 25 ohms. What is the resistance of the third resistor?
Answer: 7.5 ohms
Explanation: The resistance of the third resistor can be found by subtracting the initial total resistance from the new total resistance, resulting in a 10-ohm increase.