Chapter 4: Q20E (page 714)
Two-point charges are placed on the x-axis as follows: Charge
Short Answer
The magnitude of the net force is
Chapter 4: Q20E (page 714)
Two-point charges are placed on the x-axis as follows: Charge
The magnitude of the net force is
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Get started for freeA 5.00-A current runs through a 12-gauge copper wire (diameter
2.05 mm) and through a light bulb. Copper has
cubic meter. (a) How many electrons pass through the light bulb each
second? (b) What is the current density in the wire? (c) At what speed does
a typical electron pass by any given point in the wire? (d) If you were to use
wire of twice the diameter, which of the above answers would change?
Would they increase or decrease?
(See Discussion Question Q25.14.) Will a light bulb glow more brightly when it is connected to a battery as shown in Fig. Q25.16a, in which an ideal ammeter is placed in the circuit, or when it is connected as shown in Fig. 25.16b, in which an ideal voltmeter V is placed in the circuit? Explain your reasoning.
A silver wire 2.6 mm in diameter transfers a charge of 420 C in 80
min. Silver containsfree electrons per cubic meter. (a) What is the
current in the wire? (b) What is the magnitude of thedrift velocity of the
electrons in the wire?
A 1.50-
A cylindrical rod has resistance
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