A wire has a cross-sectional area of 0.10 mm2. If there are 4.0 × 1028 atoms per cubic meter in this wire, and if each atom contributes 2 free electrons,
what is the drift velocity of the electrons when the current in the wire is 6.0 A? (e = 1.60 × 10-19 C)
A) 0.0047 m/s B) 0.94 m/s C) 0.019 m/s D) 0.0092 m/s
A
You might also like to view...
Oceans are about four times as deep as mountains are high. At the bottom of the ocean are
A) towering mountains, deep valleys, and deep trenches near the continental borders. B) thick layers of basaltic crust at mid-ocean ridges that gradually thin near deep ocean trenches. C) towering plutonic mountains created from volcanoes and fissures at oceanic ridge areas. D) all of these
The lunar highlands appear brighter than the mare, because these highlands are due to meteor impact that completely avoided the mare
Indicate whether the statement is true or false
A longitudinal wave travels on a slinky or any long spring. The wave is represented by the equation x(x, t) = 2.1 cm cos(2000 rad/s t - 40
x). What is the direction of the disturbance of the wave?
A. the + y direction B. the + z direction C. the - x direction D. the + x direction
When Nellie Newton hangs at rest in the middle of a clothesline, the tension will not be the same in each side of the rope when
A) the lengths of rope on each side are different. B) the angles at each side of the rope are unequal. C) she is in equilibrium. D) none of the above