Two cylindrical wires are cojoined sequentially with one wire twice as thick as the other. If this combination is connected to a battery and you observe that a 3A current is flowing through the 1mm thick wire, then what is the current flowing through the 2mm thick wire? 1.0 mm 2.0 mm ЗА 6 A 1.5 A 12 A 0.11 A

Two cylindrical wires are cojoined sequentially with one wire twice as thick as the other. If this combination is connected to a battery and you observe that a 3A current is flowing through the 1mm thick wire, then what is the current flowing through the 2mm thick wire? 1.0 mm 2.0 mm ЗА 6 A 1.5 A 12 A 0.11 A

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 49P: Taking R = 1.00 k and = 250 V in Figure P21.49, determine the direction and magnitude of the...

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Figure P21.6 represents a section of a conductor of nonuniform diameter carrying a current of I = 5.00 A. The radius of cross-section A1 is r1 = 0.400 cm. (a) What is the magnitude of the current density across A1? The radius r2 at A2 is larger than the radius r1 at A1. (b) Is the current at A2 larger, smaller, or the same? (c) Is the current density at A2 larger, smaller, or the same? Assume A2 = 4A1. Specify the (d) radius, (e) current, and (f) current density at A2. Figure P21.6
In the circuit of Figure P18.22, the current I1 is 3.0 A and the values of and R are unknown. What are the currents I2 and I3? Figure P18.22
A 0.900-V potential difference is maintained across a 1.50-m length of tungsten wire that has a cross-sectional area of 0.600 mm2. What is the current in the wire?
Taking R = 1.00 k and = 250 V in Figure P21.49, determine the direction and magnitude of the current in the horizontal wire between a and e. Figure P21.49
Consider positive and negative charges all moving horizontally with the same speed through the four regions in Figure 17.2. Rank the magnitudes of the currents in these four regions from lowest to highest. (Ia is the current in Figure 17.2a, Ib the current in Figure 17.2b, etc.) (a) Id, Ia, Ic, Ib (b) Ia, Ic, Ib, Id (c) Ic, Ia, Id, Ib (d) Id, Ib, Ic, Ia (e) Ia, Ib, Ic, Id (f) None of these Figure 17.2 (Quick Quiz 17.1)
An aluminum wire 1.628 mm in diameter (14-gauge) carries a current of 3.00 amps, (a) What is the absolute value of the charge density in the wire? (b) What is the drift velocity of the electrons? (c) What would be the drift velocity if the same gauge copper were used instead of aluminum? The density of copper is 8.96 g/cm3 and thedensity of aluminum is 2.70 g/cm3. The molar mass ofaluminum is 26.98 g/mol and the molar mass of copper is 63.5 g/mol. Assume each atom of metal contributes one free electron.
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?
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Messenger JPG JPG to PDF - PDF Student Class Sche... OL Financial- Phili. i Home | Investagrams O Dashboard GOD BLESS. Question 40 Given the figure below, find the total current of the circuit. 300 Q 400 N 100 Q 12 V 200Ω 500 0 O 274 mA O 179 mA O 219 mA O 197 mA (AR) F5 F6 F7 F8 F9 F10 DIO F11 F12 A+ Pause Scr Lk 5 € 7 8 15
A 22 gauge aluminum wire is connected in series to a 30 gauge copper wire. Each of the wires is 0.75 m long. A current of 0.300 A flows through the wires. The number density of charges in aluminum is 2.1 × 1029 m-3 and in copper it is 1.1 x 1029 m-3. The charge associated with each charge is equal to the electron's charge (though it is really a hole in Aluminum, and so positive in that case...) The gauges given in the problem refer to the American Wire Gauge Standard. You will need to look up the diameter of each of the specified gauges. Other data that you need for this problem can be found in tables in your text. (a) Find the current density in each wire. (b) Find the drift speed of the electrons in each wire. (c) What is the voltage across each wire? (d) Explain how it is that copper, which has a lower density of conduction electrons than aluminum, can have a higher conductivity than aluminum.
Imagine that we connect the terminals of a 1.5 V battery with a single wire 30 centimeters long. a) What is the electric field magnitude in the wire when dynamic equilibrium is established and why? b) Does this field strength depend on the wire's conductivity and/or its cross-sectional area? c) Does the total current flowing in the wire in these circumstances depend on the wire's conductivity and/or its cross-sectional area? Explain.