In the Drude model of electrical conduction, the current density is NOT directly proportional to
a. the average time interval between successive collisions.
b. the number of charge carriers per unit volume.
c. the square of the electron charge.
d. the electric field present in the wire.
e. the resistivity of the wire.
e
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If an ideal gas molecule has a speed of 0.50 km/s at 20°C, what is its speed at 80°C?
A) 500 m/s B) 2000 m/s C) 550 m/s D) 1000 m/s
When the velocity and acceleration of an object have opposite signs, the speed of the object increases
Indicate whether the statement is true or false
Suppose a current-carrying wire has a cross-sectional area that gradually becomes smaller along the wire so that the wire has the shape of a very long, truncated cone. How does the drift speed vary along the wire?
1.It slows down as the cross section becomes smaller. 2.It speeds up as the cross section becomes smaller. 3.It doesn't change. 4.More information is needed.
Which of the following is the hardest mineral?
a. Quartz b. Diamond c. Talc d. Gypsum