Concept explainers
The quantity designated by Ampere-hours.
Answer to Problem 1OQ
Option (d) Ampere-hour designates the amount of charge.
Explanation of Solution
Write the expression for Ampere.
Here,
Write the expression for Ampere-hour.
Conclusion:
Substitute
The
The unit for current is Ampere. Thus, option (a) is incorrect.
The unit for power is Watt. Thus, option (b) is incorrect.
The unit for energy is Joule. Thus, option (c) is incorrect.
The unit for potential is Volts. Thus, option (e) is incorrect.
Want to see more full solutions like this?
Chapter 27 Solutions
Physics for Scientists and Engineers With Modern Physics
- Consider the circuit shown in Figure P20.52, where C1 = 6.00 F, C2 = 3.00 F, and V = 20.0 V. Capacitor C1 is first charged by closing switch S1. Switch S1 is then opened, and the charged capacitor is connected to the uncharged capacitor by closing S2. Calculate (a) the initial charge acquired by C1 and (b) the final charge on each capacitor. Figure P20.52arrow_forwardThe immediate cause of many deaths is ventricular fibrillation, an uncoordinated quivering of the heart, as opposed to proper beating. An electric shock to the chest can cause momentary paralysis of the heart muscle, after which the heart will sometimes start organized beating again. A defibrillator is a device that applies a strong electric shock to the chest over a time of a few milliseconds. The device contains a capacitor of a few microfarads, charged to several thousand volts. Electrodes called paddles, about 8 cm across and coated with conducting paste, are held against the chest on both sides of the heart. Their handles are insulated to prevent injury to the operator, who calls Clear! and pushes a button on one paddle to discharge the capacitor through the patient's chest Assume an energy of 3.00 102 W s is to be delivered from a 30.0-F capacitor. To what potential difference must it be charged?arrow_forwardA battery is used to charge a capacitor through a resistor as shown in Figure P27.44. Show that half the energy supplied by the battery appears as internal energy in the resistor and half is stored in the capacitor. Figure P27.44arrow_forward
- According to UE=12C(V)2 (Eq. 27.3), a greater capacitance means more energy is stored by the capacitor, but according to UE = Q2/2C (Eq. 27.2), a greater capacitance means less energy is stored. How can both of these equations be correct?arrow_forwardFor most purposes, we store electrical energy in batteries. But there are drawbacks to batteries: They release their energy rather slowly and are very damaging environmentally. Capacitors would be much cleaner for the environment and can be quickly recharged. Unfortunately they don’t store much energy. 1)A new 1.5-V AAA battery has a “capacity” (not capacitance) of 1100 mA·h. What does this “capacity” actually represent? Express it in standard SI units. (Express your answer to three significant figures.) 2)How many joules of energy can be stored in the AAA battery?( (Express your answer to two significant figures.) 3)At a steady current of 400 mA, how many hours will the AAA battery last? (Express your answer to two significant figures.) 4)How much energy can be stored in a typical 10-μF capacitor charged to a potential of 1.5 V? (Express your answer to two significant figures.) 5)How does that compare to the energy stored in the AAA battery? (Express your answer to two significant…arrow_forward(a) In electron-volts, how much work does an ideal battery with a 37.0 V emf do on an electron that passes through the battery from the positive to the negative terminal? (b) If 7.24 x 1018 electrons pass through each second, what is the power of the battery? (a) Number (b) Number i Units Unitsarrow_forward
- In the figure £₁ = 4.03 V, 2 = 0.838 V, R₁ = 5.400, R₂ = 1.660, R3 = 5.39 Q, and both batteries are ideal. What is the rate at which energy is dissipated in (a) R₁. (b) R2, and (c) R3? What is the power of (d) battery 1 and (e) battery 2? www R₁ R₂ -18₁ R₂ E (a) Number i Units (b) Number i Units (c) Number Units (d) Number i Units (e) Number Units >arrow_forwardThe battery capacity of a lithium ion battery in a digital music player is 750 mA-h. The manufacturer claims that the player can operate for eight hours if the battery is initially fully charged. Given this information, determine the number of electrons that flow through the player as you listen to your favorite songs for three hours.arrow_forward(a) In electron-volts, how much work does an ideal battery with a 39.0 V emf do on an electron that passes through the battery from the positive to the negative terminal? (b) If 4.68 × 1018 electrons pass through each second, what is the power of the battery? (a) Number (b) Number P Units Unitsarrow_forward
- If a battery contains 2500 milliAmp-hours (mAh) of charge, how much total energy can it deliver while operating an electrical device at 3.15 volts?arrow_forwardIn the figure e, = 2.32 V, E2 = 0.997 V, R1 = 6.70 N, R2 = 2.93 Q, R3 = 3.58 N, and both batteries are ideal. What is the rate at which energy is dissipated in (a) R1, (b) R2, and (c) R3? What is the power of (d) battery 1 and (e) battery 2? ww (a) Number 0.304 Units W (b) Number 0.0038 Units W (c) Number 0.222 Units (d) Number 0.494 Units (e) Number 0.0359 Unitsarrow_forwardIn the figure £₁ = 4.03 V, 2 = 0.838 V, R₁ = 5.400, R₂ = 1.66 0, R3 = 5.39 Q, and both batteries are ideal. What is the rate at which energy is dissipated in (a) R₁, (b) R₂, and (c) R3? What is the power of (d) battery 1 and (e) battery 2? R₁ R₂ Units W Units W Units W Units Units www Rg E₂ (a) Number i 1.39 (b) Number i 0.12 (c) Number i 0.31 (d) Number i (e) Number i W W < < <arrow_forward
- Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningPhysics for Scientists and Engineers with Modern ...PhysicsISBN:9781337553292Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningCollege PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning