College Physics: A Strategic Approach Technology Update, Books a la Carte Edition; Modified Mastering Physics with Pearson eText -- ValuePack Access ... Physics: A Strategic Approach (3rd Edition)
3rd Edition
ISBN: 9780134532462
Author: Randall D. Knight (Professor Emeritus), Brian Jones
Publisher: PEARSON
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Chapter 22, Problem 7P
A capacitor is charged to 6.0 × 10–4 C, then discharged by connecting a wire between the two plates. 40 μs after the discharge begins, the capacitor still holds 13% of its original charge. What was the average current during the first 40 μs of the discharge?
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A 200-km-long high-voltage transmission line 2.00 cm in diameter carries a steady current of 1 000 A. If the conductor is copper with a free charge density of 8.50 x 1028 electrons per cubic meter, how many years does it take one electron to travel the full length of the cable?
A high-voltage transmission line with a diameter of 2.00 cm and a length of 200 km carries a steady currentof 1 000 A. If the conductor is copper wire with a freecharge density of 8.46 ×1028 electrons/m3, over whattime interval does one electron travel the full length of the line?
A copper wire is dCu = 0.0500 cm in diameter, 3.00 m long, and has a charge carrier density of 8.50x10^28 electrons/m3. The copper wire is attached to an equal length of aluminum wire with diameter dAl = 0.0100 cm and charge carrier density of 6.02x10^28 electrons/m3. A current of 0.400 A flows through the copper wire.
a. The ratio of current densities in the two wires, JCu/JAl is:___.
b. The ratio of drift velocities in the two wires, vd–Cu/vd–Al is:____.
Chapter 22 Solutions
College Physics: A Strategic Approach Technology Update, Books a la Carte Edition; Modified Mastering Physics with Pearson eText -- ValuePack Access ... Physics: A Strategic Approach (3rd Edition)
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