This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: Practice Quiz 8 (Combined Chapters 17-18) 1) A light bulb operating at a voltage of 120 V has a resistance of 200 . What is the power? A) 100 W B) 72 W C) 14 10-3 W D) 7.2 W Answer: B 2) A 100-W light bulb is connected to a 110-V source. What is the resistance of this bulb? A) 100 B) 8.00 10-3 C) 121 D) 242 Answer: C 3) If one doubles the emfs in a circuit and doubles the resistances in the circuit at the same time, what happens to the currents through the resistors? Assume there are only emfs and resistors in the circuit. A) They stay the same. B) They double. C) They quadruple. D) They halve. Answer: A 4) A 10-V-emf battery is connected in series with the following: a 2- F capacitor, a 2- resistor, an ammeter, and a switch, initially open; a voltmeter is connected in parallel across the capacitor. After the switch has been closed for a relatively long period (several seconds, say), what are the current and capacitor voltage readings, respectively? voltage readings, respectively?...
View Full Document