ει R1 a R1 w R2 R1 www R1 As shown in the figure, the resistances are R1 = 3.0 2 and R2 = 6.0 2, and the ideal batteries have emfs E₁ = 5.0 V, and E2 = E3 = 10.0 V. What is the size and direction of the current in battery 1 (ta positive current as that flowing through the battery from - to +)? Submit Answer Tries 0/10 What is the size and direction of the current in battery 2 (take positive current as that flowing through the battery from to +)? Submit Answer Tries 0/10 What is the size and direction of the current in battery 3 (take positive current as that flowing through the battery from - to +)? Submit Answer Tries 0/10 What is the potential difference Va - Vb? Submit Answer Tries 0/10

ει R1 a R1 w R2 R1 www R1 As shown in the figure, the resistances are R1 = 3.0 2 and R2 = 6.0 2, and the ideal batteries have emfs E₁ = 5.0 V, and E2 = E3 = 10.0 V. What is the size and direction of the current in battery 1 (ta positive current as that flowing through the battery from - to +)? Submit Answer Tries 0/10 What is the size and direction of the current in battery 2 (take positive current as that flowing through the battery from to +)? Submit Answer Tries 0/10 What is the size and direction of the current in battery 3 (take positive current as that flowing through the battery from - to +)? Submit Answer Tries 0/10 What is the potential difference Va - Vb? Submit Answer Tries 0/10

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter29: Direct Current (dc) Circuits

Section: Chapter Questions

Problem 64PQ: Ralph has three resistors, R1, R2, and R3, connected in series. When connected to an ideal emf...

See similar textbooks

Similar questions

Ralph has three resistors, R1, R2, and R3, connected in series. When connected to an ideal emf source E1, current I1 flows through the resistors. a. If the resistors are instead connected to a second source with E2=2E1, what is the new current through the resistors in terms of the first current? b. Show that, if each resistance is doubled and the resistors are connected in series to the second emf source, the current through the resistors is equal to I1.
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?
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
Semi-truck or trucks use four large 12-V batteries. The starter systemrequires 24 V, while normal operation of the truck’s other electrical components utilizes 12 V. How could the four batteries be connected to produce 24 V? To produce 12 V? Why is 24 V better than 12 V for starting the truck’s engine (a very heavy load)?
Consider a resistor made from a hollow cylinder of carbon as shown below. The inner radius of the cylinder is Ri= 0.20 mm and the outer radius is R0 = 0.30 mm. The length of the resistor is L = 0.90 mm. The resistivity of the carbon is =3.5105 m. (a) Prove that theresistance perpendicular from the axis is R=2L1n(R0Ri) . (b) What is the resistance?
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 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?
Resistors are commonly rated at 18W,14W,12W ,1 W and 2 W for use in electrical circuits. If a current of1 = 2.00 A is accidentally passed through a R=1.00 resistor rated at 1 W, what would be the most probable outcome? Is there anything that can be done to prevent such an accident?
The student engineer of a campus radio station wishes to verify the effectiveness of the lightning rod on the antenna mast (Fig. P21.71). The unknown resistance Rx is between points C and E. Point E is a true ground, but it is inaccessible for direct measurement because this stratum is several meters below the Earths surface. Two identical rods are driven into the ground at A and B, introducing an unknown resistance Ry. The procedure is as follows. Measure resistance R1 between points A and B, then connect A and B with a heavy conducting wire and measure resistance R2 between points A and C. (a) Derive an equation for Rx in terms of the observable resistances, R1 and R2. (b) A satisfactory ground resistance would be Rx 2.00 . Is the grounding of the station adequate if measurements give R1 = 13.0 and R2 = 6.00 ? Explain. Figure P21.71
Currents of approximately 0.06 A can be potentially fatal. Currents in that range can make the heart fibrillate (beat in an uncontrolled manner). The resistance of a dry human body can be approximately 100 k . (a) What voltage can cause 0.06 A through a dry human body? (b) When a human body is wet, the resistance can fall to 100 . What voltage can cause harm to a wet body?
In the figure the resistances are R1 = 1.0 Ω and R2 = 2.0 Ω, and the ideal batteries have emfs ε1 = 2.9 V, and ε2 = ε3 = 3.7 V. What are the (a) size and direction (up or down) of the current in battery 1, the (c) size and direction of the current in battery 2, and the (e) size and direction of the current in battery 3?
In the figure the ideal batteries have emfs 1 = 26 V and 2 = 7.0 V and the resistors have resistances R1 = 4.2 Ω and R2 = 8.3 Ω. What are (a) the current, the energy dissipation rate in (b) resistor 1 and (c) resistor 2, and the energy transfer rate in (d) battery 1 and (e) battery 2? Is energy being supplied or absorbed by (f) battery 1 and (g) battery 2?