Consider the circuit shown in the figure below. (Assume R, = 11.5 2, R, = 1.30 SQ, and V = 6.85 V.) 4.00 Ω 5.00 N R2 3.00 N (a) Calculate the equivalent resistance of the R, and 5.00-2 resistors connected in parallel. (b) Using the result of part (a), calculate the combined resistance of the R,, 5.00-2 and 4.00-2 resistors. (c) Calculate the equivalent resistance of the combined resistance found in part (b) and the parallel 3.00-Q resistor.

Consider the circuit shown in the figure below. (Assume R, = 11.5 2, R, = 1.30 SQ, and V = 6.85 V.) 4.00 Ω 5.00 N R2 3.00 N (a) Calculate the equivalent resistance of the R, and 5.00-2 resistors connected in parallel. (b) Using the result of part (a), calculate the combined resistance of the R,, 5.00-2 and 4.00-2 resistors. (c) Calculate the equivalent resistance of the combined resistance found in part (b) and the parallel 3.00-Q resistor.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter10: Direct-current Circuits

Section: Chapter Questions

Problem 45P: A child's electronic toy is supplied by three 1.58-V alkaline cells having internal resistances of...

See similar textbooks

Similar questions

A child's electronic toy is supplied by three 1.58-V alkaline cells having internal resistances of 0.0200 inseries with a 1.53-V carbon-zinc dry cell having a 0.100- internal resistance. The load resistance is 10.0 . (a) Draw a circuit diagram of the toy and itsbatteries, (b) What current flows? (c) How much power is supplied to the load? (d) What is the internal resistance of the dry cell if it goes bad, resulting in only 0.500 W being supplied to the load?
Explain why R=R0(1 + a?T) for the temperature variation of the resistance R of an object is not as accurate as P=P0(1 + a?T) which gives the temperature variation of resistivity P.
The power dissipated in a resistor is given by P = V2/R, which means power decreases if resistance increases. Yet this power is also given by P = I2R, which means power increases if resistance increases. Explain why there is no contradiction here.
A circuit loop containing an external resistor of value R = 25.0 (ohms) is connected to a real battery with an internal emf = 20.0 V that has an internal resistance of R = 1.50 (ohms). How much power is generated by the power supply in Watts?
A child’s electronic toy is supplied by three 1.58-V alkaline cells having internal resistances of 0.0200 Ω in series with a 1.53-V carbon-zinc dry cell having a 0.100-Ω internal resistance. The load resistance is 10.0 Ω . (a) Draw a circuit diagram of the toy and its batteries. (b) What currentflows? (c) How much power is supplied to the load? (d) Whatis the internal resistance of the dry cell if it goes bad, resultingin only 0.500 W being supplied to the load?
An initially uncharged 4.35×10−6 F capacitor and a 7690 ohm resistor are connected in series to a 1.50 V battery that has negligible internal resistance. What is the initial current i0 in the circuit? i0=? Calculate the circuit's time constant ? . ?=?s How much time ? must elapse from the closing of the circuit for the current to decrease to 3.85% of its initial value? t=?
The circuit shows R= 1 ohm, Emf1= 12.2 V and Emf 2= 7.1 V. What is the power delivered to the 10R resistor in W? Note: 1.0857 is the correct answer. Show.
A battery with EMF of 20 V and an internal resistance, r = 0.02 ohms is connected to the load resistances, R1 = 115 ohms, R2 = 147 ohms and R3 = 25 ohms. Determine the total current flowing in the circuit.
A wire of resistance 5.0 ohm is connected to a battery whose emf is 2.0 V and whose internal resistance is 1.0. In 2.0 min, how much energy is (a) transferred from chemical form in the battery, (b) dissipated as thermal energy in the wire, and (c) dissipated as thermal energy in the battery?
An electronic device designed to operate at any temperature in the range from −10.0 °C to 55.0 °C contains pure carbon resistors. By what factor does their resistance increase over this range?
In a tDCS treatment procedure, 0.85 mA of current flows through a patient’s brain when there is a 7.4-V potential difference between the electrodes. Whatis the equivalent resistance between the electrodes?
On three separate instances you connect each lightbulb to a battery with an emf of 12.00 V and an internal resistance of 0.5 Ω. When a current of 4 A passes through the battery, what is the resistance in the LED, CFL (compact fluorescent light) and incandescent lightbulbs?