Consider the circuit shown in the figure below. (Let R = 38.0 2.) 10.0 Ω 25.0 V www 10.00 b w 5.00 3 w R 5.00 Ω × (a) Find the current in the 38.0-Q resistor. 38.0 i Compare the potential difference across the 10-Q resistor, the 5-0 resistor and the (R + 5-02) resistor combination. What can you conclude about these resistors? A (b) Find the potential difference between points a and b. 20.22 x How does the potential difference between points a and b relate to the current through resistor R? V

Consider the circuit shown in the figure below. (Let R = 38.0 2.) 10.0 Ω 25.0 V www 10.00 b w 5.00 3 w R 5.00 Ω × (a) Find the current in the 38.0-Q resistor. 38.0 i Compare the potential difference across the 10-Q resistor, the 5-0 resistor and the (R + 5-02) resistor combination. What can you conclude about these resistors? A (b) Find the potential difference between points a and b. 20.22 x How does the potential difference between points a and b relate to the current through resistor R? V

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter28: Direct-current Circuits

Section: Chapter Questions

Problem 28.21P: Consider the circuit shown in Figure P28.21 on page 860. (a) Find the voltage across the 3.00-0...

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Similar questions

Consider the circuit shown in Figure P28.21 on page 860. (a) Find the voltage across the 3.00-0 resistor, (b) Find the current in the 3.00-12 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?
A battery has an emf of 15.0 V. The terminal voltage of the battery is 11.6 V when it is delivering 20.0 W of power to an external load resistor R. (a) What is the value of R? (b) What is the internal resistance of the battery?
For the network in Figure P18.60, show that the resistance between points a and b is Rab=2717. (Hint: Connect a battery with emf across points a and b and determine /I, where I is the current in the battery.) Figure P18.60
Figure P29.45 shows five resistors connected between terminals a and b. a. What is the equivalent resistance of this combination of resistors? b. What is the current through each resistor if a 24.0-V battery is connected across the terminals?
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?
(a) Can the circuit shown in Figure P18.29 be reduced to a single resistor connected to the batteries? Explain. (b) Find the magnitude of the current and its direction in each resistor. Figure P18.29
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?
(a) What is the resistance of a 1.00 102-O, a 2.50-k O, and a 4.00-kresistor connected in series? (b) In parallel?
(a) Find the current in each resistor of Figure P18.18 by using the rules for resistors in series and parallel. (b) Write three independent equations for the three currents using Kirchhoffs laws: one with the node rule; a second using the loop rule through the battery, the 6.0- resistor, and the 24.0- resistor; and the third using the loop rule through the 12.0- and 24.0- resistors. Solve to check the answers found in part (a). Figure Pl8.18
In the circuit shown below E = 75.0 V, R5 = 4.0o n, R3 = 2.00 n, R2 = 2.20 n, Iş = 8.40 A, I4 = 5.50 A, and I = 11.0 A. Find the current through Rz and R3, and the values of the resistors R, and Ra. Iz = I3 = A R1 = R. = R4 ww Is ww
Consider the circuit shown in the figure below. (Let R = 28.0 M.) 25.0 V 5.00 Ω a 10.0 Ω 10.0 Ω ww www 5.00 Ω b (a) Find the current in the 28.0- resistor. .0242 X Compare the potential difference across the 10- resistor, the 5- resistor and the (R + 5-0) resistor combination. What can you conclude about these resistors? A (b) Find the potential difference between points a and b. .798 X You appear to be correctly calculating this potential difference using your incorrect value for the current from part (a). V