Chapter 4: Q4DQ (page 1043)
Short Answer
When the charge on left plate is positive but decreasing in time so time rate of charges
Chapter 4: Q4DQ (page 1043)
When the charge on left plate is positive but decreasing in time so time rate of charges
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Get started for freeA cylindrical rod has resistance
A 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?
You want to produce three 1.00-mm-diameter cylindrical wires,
each with a resistance of 1.00 Ω at room temperature. One wire is gold, one
is copper, and one is aluminum. Refer to Table 25.1 for the resistivity
values. (a) What will be the length of each wire? (b) Gold has a density of
What will be the mass of the gold wire? If you consider the current price of gold, is
this wire very expensive?
An electron at point
An electron experiences a magnetic force of magnitude
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