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Transcript
Physics 2135 Test-Level Problems for Recitation 12 _____1. If the voltage across a resistor is doubled, which of the following is true? [A] The power dissipated by the resistor doubles and the resistance doubles. [B] The power dissipated by the resistor quadruples and the resistance doubles. [C] The power dissipated by the resistor doubles and the resistance is unchanged. [D] The power dissipated by the resistor quadruples and the resistance is unchanged _____2. The same potential difference is applied to a 30-W and a 60-W light bulb. Which of the following is true? [A] The 30-W bulb has a higher resistance and carries a greater current. [B] The 60-W bulb has a higher resistance, but the 30-W bulb carries a greater current. [C] The 60-W bulb has a higher resistance and carries a greater current. [D] The 30-W bulb has a higher resistance, but the 60-W bulb carries a greater current. 3. A battery has an emf of 9.20 V and negligible internal resistance. What resistance connected across the battery will extract a power of 12.8 W?
