7.The circuit diagram below shows a circuit containing batteries and resistors. You may assume thatthe batteries have negligible internal resistance.1.25 A6210 Q0.5 Aa) Use Kirchhoff's first law to find the current flowing through the 6.0 N and 10.0 N resistorsb) Calculate the e.m.f. of ɛ1.c) Calculate the e.m.f. of ɛ2.

Kirchhoff's first law or the junction rule states that the current entering at the node is equal to…

7. The circuit diagram below shows a circuit containing batteries and resistors. You may assume that the batteries have negligible internal resistance. 1.25 A 60 10 Q 0.5 A a) Use Kirchhoff's first law to find the current flowing through the 6.0 N and 10.0 N resistors b) Calculate the e.m.f. of ɛ. c) Calculate the e.m.f. of ɛ2.

7. The circuit diagram below shows a circuit containing batteries and resistors. You may assume that the batteries have negligible internal resistance. 1.25 A 60 10 Q 0.5 A a) Use Kirchhoff's first law to find the current flowing through the 6.0 N and 10.0 N resistors b) Calculate the e.m.f. of ɛ. c) Calculate the e.m.f. of ɛ2.

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 34AP: The circuit in Figure P27.34a consists of three resistors and one battery with no internal...

See similar textbooks

Similar questions

The following statements are related to household circuits and electrical safety. Determine whether each statement is true (T) or false (F). (a) Circuit breakers are wired in series with the outlets they protect. (b) A circuit breaker rated at 20 A provides a constant current of 20 A to each outlet in the circuit. (c) Three-wire electrical cords help prevent dangerous electrical shocks by grounding the case of a device.
The following statements are related to household circuits and electrical safety. Determine whether each statement is true (T) or false (F). (a) Circuit breakers are wired in series with the outlets they protect. (b) A circuit breaker rated at 20 A provides a constant current of 20 A to each outlet in the circuit. (c) Three-wire electrical cords help prevent dangerous electrical shocks by grounding the case of a device.
The circuit in Figure P27.34a consists of three resistors and one battery with no internal resistance. (a) Find the current in the 5.00- resistor. (b) Find the power delivered to the 5.00- resistor. (c) In each of the circuits in Figures P27.34b, P27.34c, and P27.34d, an additional 15.0-V battery has been inserted into the circuit. Which diagram or diagrams represent a circuit that requires the use of Kirchhoffs rules to find the currents? Explain why. (d) In which of these three new circuits is the smallest amount of power delivered to the 10.0- resistor? (You need not calculate the power in each circuit if you explain your answer.) Figure P27.34
(a) Find the terminal voltage of a 12.0-V motorcycle battery having a 0.600- internal resistance, if it is being charged by a current of 10.0 A. (b) What is the output voltage of the battery charger?
Unreasonable Results (a) What is the internal resistance of a 1.54-V dry cell that supplies 1.00 W of power to a 15.0- bulb? (b) What is unreasonable about this result? (c) Which assumptions are unreasonable or inconsistent?
The label or a portable radio recommends the use of rechargeable nickel-cadmium cells (nicads), although they have a 1.25-V emf while alkaline cells have a 1.58-V emf. The radio has a 3.20- resistance, (a) Draw a circuit diagram ot the radio and its batteries. Now, calculate the power delivered to the radio, (b) When using Nicad cells each having an internal resistance of 0.0400O. (c) When using alkaline cells each having an internal resistance of 0.200 . (d) Does this difference seem significant, considering that the radio s effective resistance is lowered when its volume is turned up?
Consider the circuit shown below. Each battery has an emf of 1.50 V and an internal resistance of 1.00 . (a) What is the current through the external resistor, which has a resistance of 10.00 ohms? (b) What is the terminal voltage of each battery?
Consider the circuit shown below, (a) Find the current through each resistor, (b) Check the calculations by analyzing the power in the circuit.
Construct Your Own Problem Consider an electric immersion heater used to heat a cup of water to make tea. Construct a problem in which you calculate the needed resistance of the heater so that it increases the temperature of the water and cup in a reasonable amount of time. Also calculate the cost of the electrical energy used in your process. Among the things to be considered are the voltage used, the masses and heat capacities involved, heat losses, and the time over which the heating takes place. Your instructor may wish for you to consider a thermal safety switch (perhaps bimetallic) that will halt the process before damaging temperatures are reached in the immersion unit.
Why is the following situation impossible? A technician is testing a circuit that contains a resistance R. He realizes that a better design for the circuit would include a resistance 73R rather than R. He has three additional resistors, each with resistance R. By combining these additional resistors in a certain combination that is then placed in series with the original resistor, he achieves the desired resistance.
. All of the electrical outlets in a room are connected in a single parallel circuit (Figure 7.38). The circuit is equipped with a 20-A fuse, and the voltage is 120 V. (a) What is the maximum total power that can be supplied by the outlets without blowing the fuse? (b) How many 1,200-W appliances can be plugged into the sockets without blowing the fuse?
A 0.0200- ammeter is placed in series with a 10.00- resistor in a circuit, (a) Draw a circuit diagram of the connection, (b) Calculate the resistance of the combination, (c) If the voltage is kept the same across the combination as it was through the 10.00- resistor alone, what is the percent decrease in current? (d) If the current is kept the same through the combination as it was through the 10.00-resistor alone, what is the percent increase in voltage? (e) Are the changes found in parts (c) and (d) significant? Discuss.