9. The following question is about power dissipation in a resistor, which we didnÃ¢ÂÂt really cover in class. This topic is fairly easy though. In a circuit, all the power delivered by the battery must be dissipated by the elements to the circuit. This is simply a statement of the conservation of energy. How much energy dis- sipated depends on the resistance of the element and the voltage across the resistor, or the current through it. The relevant equa- tions for the problems are as follows. For a circuit element, the power dissipated (or generated) is P= IV, where V and I are the voltage across and current through a circuit element. We know that a resistor obeys OhmÃ¢ÂÂs Law V = IR, which means that for a resistor, the power dissipated is P = 1²R=V²/R. Consider the following two circuits with identical batteries and re- sistors. A В C R R RSRS R If the power dissipated by the resistor in circuit A is P, what is the power dissipated by one resistor in circuit B? If the power dissipated by the resistor in circuit A is P, what is the power dissipated by one resistor in circuit C?

9. The following question is about power dissipation in a resistor, which we didnÃ¢ÂÂt really cover in class. This topic is fairly easy though. In a circuit, all the power delivered by the battery must be dissipated by the elements to the circuit. This is simply a statement of the conservation of energy. How much energy dis- sipated depends on the resistance of the element and the voltage across the resistor, or the current through it. The relevant equa- tions for the problems are as follows. For a circuit element, the power dissipated (or generated) is P= IV, where V and I are the voltage across and current through a circuit element. We know that a resistor obeys OhmÃ¢ÂÂs Law V = IR, which means that for a resistor, the power dissipated is P = 1²R=V²/R. Consider the following two circuits with identical batteries and re- sistors. A В C R R RSRS R If the power dissipated by the resistor in circuit A is P, what is the power dissipated by one resistor in circuit B? If the power dissipated by the resistor in circuit A is P, what is the power dissipated by one resistor in circuit C?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

In a series RC circuit shown, the switch is closed and after a short time, the charge q on the capacitor is 5.2 x 10-5 C. What is the current in the resistor at this time?
ww 24 0 Questions 3 & 4 refer to the circuit shown in the figure. The battery emf is 12 V. ww ww ww 12 0 3. What is the power dissipated by the 8 N resistor? [Hint: don't make this more work that you have to.] А. 4.5 W В. 6.0 W C. 8.0 W D. 18 W 3. 4. What is the current through the battery? [Hint: now you really do have to do all that work!] А. 0.50 A В. 1.5 А С. 3.0 А D. 6.0 A 4.
120V series-wired ornamental lightbulbs, Figure 1. Suppose you have a string of 48bulbs, each one with a resistance of 8.00Ω. Assume the resistance of a bulb with itsfilament broken drops to zero. Suppose that a bulb becomes dangerously warm, sothat it could set something on fire, if it receives a power of 1.75 W. How many bulbscan fail before the string of lights becomes dangerous?
#20
6. In the figure R1 = 6.65 N, R2 = 20.0 N, and the ideal battery has emf ɛ = 13.9 V. How much energy in J is dissipated by all four resistors in 0.02017 hour? R1 R R2 ww (a) 1.98x10² (b) 1.05x103 (c) 2.02x10³ (d) 1.83x10³ (e) None of the above
Ash is working in the lab, and comes across a box of unlabeled resistors (thanks to his messy coworker who never puts them back properly). He remembers that he can find out the resistance using an ammeter to measure current, and a battery with a known voltage. Ash picks a resistor of unknown resistance (in §), connects it to some wires, and then plugs in a battery with a voltage of 12.1 V. This creates a circuit. Using the ammeter, he finds that the current in the circuit is 5.2 A. In ohms, what is the resistance of the unknown resistor? Answer: Ω.
What is the output voltage (in V) of a 3.0000 V lithium cell in a digital wristwatch that draws 0.340 mA, if the cell's internal resistance is 1.90 Ω?