Given two batteries: one with voltage V and internal resistance r₁; another with also voltage V and internal resistance r2. Which of the following is true if we connect them in series facing the opposite direction? O No voltage will remain, while the total internal resistance will be r₁ + 2. The total voltage will be -V, while the total internal resistance will be r₁ + 12. O The total voltage will be -2V, while the total internal resistance will be r₁ r2. The answer can be found on the other choices.

Given two batteries: one with voltage V and internal resistance r₁; another with also voltage V and internal resistance r2. Which of the following is true if we connect them in series facing the opposite direction? O No voltage will remain, while the total internal resistance will be r₁ + 2. The total voltage will be -V, while the total internal resistance will be r₁ + 12. O The total voltage will be -2V, while the total internal resistance will be r₁ r2. The answer can be found on the other choices.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter10: Direct-current Circuits

Section: Chapter Questions

Problem 25P: A 12.0-V emf automobile battery has a terminal voltage of 16.0 V when being charged by a current of...

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(a) What is the internal resistance of a voltage source if its terminal voltage drops by 2.00 V when the current supplied increases by 5.00 A? (b) Can the emf of the voltage source be found with the information supplied?
(a) What is the terminal voltage of a large 1.54-V carbon-zinc dry cell used in a physics lab to supply 2.00 A to a circuit if the cell’s internal resistance is 0.100 ? (b) How much electrical power does the cell produce? (c) What power goes to its load?
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A 12.0-V emf automobile battery has a terminal voltage of 16.0 V when being charged by a current of 10.0 A. (a) What is the battery’s internal resistance? (b) What power is dissipated inside the battery? (c) At what rate (in °C/min ) will its temperature increase if its mass is 20.0 kg and it has a specific heat of 0.300 kcal/kg • °C, assuming no heat escapes?
Consider the circuit below. The capacitor has a capacitance of 10 mF. The switch is closed and after a long time the capacitor is fully charged, (a) What is the current through each resistor a long time after the switch is closed? (b) What is the voltage across each resistor a long rime after the switch is closed? (c) What is the voltage across the capacitor a long time after the switch is closed? (d) What is the charge on the capacitor a long time after the switch is closed? (e) The switch is then opened. The capacitor discharges through the resistors. How long from the time before the current drops to one fifth of the initial value?
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?
A homemade capacitor is constructed of 2 sheets of aluminum foil with an area of 2.00 square meters, separated by paper, 0.05 mm thick, of the same area and a dielectric constant of 3.7. The homemade capacitor is connected in series with a 100,00- resistor, a switch, and a 6.00-V voltage source, (a) What is the RC time constant of the circuit? (b) What is the initial current through the circuit, when the switch is closed? (c) How long does it take the current to reach one third of its initial value?
Given two batteries: one with voltage V and internal resistance r₁; another with also voltage V and internal resistance r2. Which of the following is true if we connect them in parallel the positive terminal of one connected to the negative of the other? O The total voltage will be V, while the total internal resistance is (₁−1 + √2-1)-1. O The answer cannot be found on the other choices. The total voltage will be 2V, while the total internal resistance is (r₁-1 + r₂-1)-1. No voltage will remain, while the total internal resistance is (r₁-1 + √₂-1)-1.
ليا O₂. C O b. 4C OC. EC Od. EC Oe. EC www.t 3R с ww E The circuit in the figure has been on for a long time. What is the charge on the capacitor? Hint: C behaves like open circuit when it is "fully charged". SR
Given two batteries: one with voltage V and internal resistance r7: another with also voltage Vand internal resistance r2. Which of the following is true if we connect them in series facing the opposite direction? O No voltage will remain, while the total internal resistance will be r1 +r2. O The total voltage will be -V, while the total internal resistance will be r, +r2. O The total voltage will be -2V, while the total internal resistance will be r1 + r2. O The answer can be found on the other choices.
NUMBER ONE
Consider the adjacent circuit, where R1=R3=RL=2 kilo-Ohms, R2=3 kilo-Ohms, V1= 10V, and V2=8 V. The Thevenin equivalent voltage between points A and B (in Volts) is: R1 A RL B R2 V1 V2 R3 O a. 5.00 O b. 4.29 O c. 10.00 O d. 3.00 O e. 1.43