You have a faculty position at a community college and are m (caching a class in automotive technology. You are deep in a discussion of using jumper cables to start a car with a dead battery from a car with a fresh battery. You have drawn the circuit diagram in Figure P27.16 to explain the process. The battery on the left is the live batten- in the correctly functioning car, with emf ε and internal resistance R L where the L . subscript refers to “live.” Its terminals are connected directly across those of the dead battery, in the middle of the diagram, with emf ε and internal resistance R D where the D subscript refers to "dead” Then, the starter in the car with the dead battery is activated by closing the ignition switch, allowing the car to start. The resistance of the starter is R s . A student raises his hand and asks, “So is the dead battery being charged while the starter is operating?” How do you respond?
You have a faculty position at a community college and are m (caching a class in automotive technology. You are deep in a discussion of using jumper cables to start a car with a dead battery from a car with a fresh battery. You have drawn the circuit diagram in Figure P27.16 to explain the process. The battery on the left is the live batten- in the correctly functioning car, with emf ε and internal resistance R L where the L . subscript refers to “live.” Its terminals are connected directly across those of the dead battery, in the middle of the diagram, with emf ε and internal resistance R D where the D subscript refers to "dead” Then, the starter in the car with the dead battery is activated by closing the ignition switch, allowing the car to start. The resistance of the starter is R s . A student raises his hand and asks, “So is the dead battery being charged while the starter is operating?” How do you respond?
Solution Summary: The author explains that the circuit having live and dead batteries is shown in the following figure.
You have a faculty position at a community college and are m (caching a class in automotive technology. You are deep in a discussion of using jumper cables to start a car with a dead battery from a car with a fresh battery. You have drawn the circuit diagram in Figure P27.16 to explain the process. The battery on the left is the live batten- in the correctly functioning car, with emf ε and internal resistance RL where the L. subscript refers to “live.” Its terminals are connected directly across those of the dead battery, in the middle of the diagram, with emf ε and internal resistance RD where the D subscript refers to "dead” Then, the starter in the car with the dead battery is activated by closing the ignition switch, allowing the car to start. The resistance of the starter is Rs. A student raises his hand and asks, “So is the dead battery being charged while the starter is operating?” How do you respond?
a. A proton beam in an accelerator carries a current of 110 µA. If the beam is incident on a target, how many protons strike the target in a period of 25.0 s? protons
b. An electric heater carries a current of 20.0 A when operating at a voltage of 4.20 102 V. What is the resistance of the heater? Ω
c. If a certain silver wire has a resistance of 10.00 Ω at 15.0°C, what resistance will it have at 29.0°C? Ω
You connect a battery, resistor, and capacitor as in the figure, where R = 16.0 Ω and C = 8.00 ×10−6 F. The switch S is closed at t = 0. When the current in the circuit has magnitude 3.00 A, the charge on the capacitor is 40.0 × 10−6 C.
(a) What is the emf of the battery?
(b) At what time t after the switch is closed is the charge on the capacitor equal to 40.0×10−6 C?
(c) When the current has magnitude 3.00 A, at what rate is energy being stored in the capacitor?
(d) When the current has magnitude 3.00 A, at what rate is energy being supplied by the battery?
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).
a. How much power is lost due to the internal resistance in the power supply, in Watts?
b. How much energy is lost in the external resistor (R), in Watts?
Chapter 28 Solutions
Physics for Scientists and Engineers, Technology Update (No access codes included)
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DC Series circuits explained - The basics working principle; Author: The Engineering Mindset;https://www.youtube.com/watch?v=VV6tZ3Aqfuc;License: Standard YouTube License, CC-BY