A wire carries a steady current of 0.1 A over a period of 20 s. What total charge passes through the wire in this time interval? a. 200 C b. 20 C c. 20 d. 0.005 C Ans. 2. You measure a 25.0 V potential difference across a 5.00 2 resistor. What is the current flowing through it? a. 125 A (b.) 5.00 A c. 4.00 A d. 1.00 A Ans. 3. A 2.0 mm diameter wire of length 20 m has a resistance of 0.25 2. What is the resistivity of the wire? a. 5.0 x 10-7 m b. 3.9 x 10-8 :m c. 4.0 x 10-7 n m d. 16x 10-3 Ω m Ans. Show transcribed image text 1. A wire carries a steady current of 0.1 A over a period of 20 s. What total charge passes through the wire in this time interval? 2. You measure a 25.0 V potential difference across a 5.00 ohm resistor. What is the current flowing through it?

A wire carries a steady current of 0.1 A over a period of 20 s. What total charge passes through the wire in this time interval? a. 200 C b. 20 C c. 20 d. 0.005 C Ans. 2. You measure a 25.0 V potential difference across a 5.00 2 resistor. What is the current flowing through it? a. 125 A (b.) 5.00 A c. 4.00 A d. 1.00 A Ans. 3. A 2.0 mm diameter wire of length 20 m has a resistance of 0.25 2. What is the resistivity of the wire? a. 5.0 x 10-7 m b. 3.9 x 10-8 :m c. 4.0 x 10-7 n m d. 16x 10-3 Ω m Ans. Show transcribed image text 1. A wire carries a steady current of 0.1 A over a period of 20 s. What total charge passes through the wire in this time interval? 2. You measure a 25.0 V potential difference across a 5.00 ohm resistor. What is the current flowing through it?

Physics for Scientists and Engineers with Modern Physics

10th Edition

ISBN:9781337553292

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter27: Direct-current Circuits

Section: Chapter Questions

Problem 15P: Four resistors are connected to a battery as shown in Figure P27.15. (a) Determine the potential...

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Four resistors are connected to a battery as shown in Figure P27.15. (a) Determine the potential difference across each resistor in terms of . (b) Determine the current in each resistor in terms of I. (c) What If? If R3 is increased, explain what happens to the current in each of the resistors. (d) In the limit that R3 , what are the new values of the current in each resistor in terms of I, the original current in the battery? Figure P27.15
A 20.00-V battery is used to supply current to a 10-k resistor. Assume the voltage drop across any wires used for connections is negligible, (a) What is the current through the resistor? (b) What is the power dissipated by the resistor? (c) What is the power input from the battery; assuming all the electrical power is dissipated by the resistor? (d) What happens to the energy dissipated by the resistor?
The- pair of capacitors in Figure P28.63 are fully charged by a 12.0-V battery. The battery is disconnected, and the switch is then closed. Alter 1.00 ms has elapsed, (a) how much charge remains 011 the 3.00-F capacitor? (b) How much charge remains on the 2.00-F capacitor? (c) What is the current in the resistor at this time?
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A car battery with a 12-V emf and an internal resistance of 0.050 is being charged with a current of 60 A. Note that in this process the battery is being charged. (a) What is the potential difference across its terminals? (b) At what rate is thermal energy being dissipated in the battery? (c) At what rate is electric energy being converted to chemical energy? (d) What are the answers to (a) and (b) when the battery is used to supply 60 A to the starter motor?
41. A 5.0-µF capacitor with an initial charge of 60 µF discharges while connected in series CHA with a 20-kl resistor. (A) What is the initial potential difference across the capacitor? (B) What is the initial current? (C) What is the half-life? (D) How much charge is stored on the capacitor after 0.20 s?
2. If a circuit element can withstand a maximum current of 15 A, how many electrons can pass through it each second?3. How many electrons are transferred in a 10.0 A current that runs for 3.0 s?4. If 2.00 × 102mA of current flows through the filament of a light bulb, how many electrons would pass through the filament in 30.0 s?5. What feature of a river is most similar to current in an electric circuit? (A) The depth of the river measured in meters (B) The temperature of the water measured in degrees Celsius (C) The vertical drop between two points along the river measured in meters (D) The volume of water moving past a point measured in liters per second
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he human body can exhibit a wide range of resistances to current depending on the path of the current, contact area, and sweatiness of the skin. Suppose the resistance across the chest from the left hand to the right hand is 1.45 ✕ 106 Ω. (a) How much voltage is required to cause possible heart fibrillation in a man, which corresponds to 320 mA of direct current? V(b) Why should rubber-soled shoes and rubber gloves be worn when working around electricity?
5 part A: If u(C) = 0.2C. What in the uncertainty of a 500 mF capacitor in mF? 5 Part B: If C = 500 mF and R = 8000 W , and V = 5 V. What is the voltage across the resistor in an RC circuit if it started out fully charged and the time since we started charging 6 seconds ago?