An annulus has inner and outer radii a and b, respectively and carries a uniform surface charge density o (where sigma is a positive constant, the charge is distributed between the surface of disk of radius a and disk of radius b.) The annulus is on the xy plane as shown in the figure. A point positive charge of q and mass m is released at rest at z = 0 and slightly pushed (i.e., its initial speed is almost zero and can be ignored). Find the ultimate speed of the charge at z = 0 in terms of k (Coulomb's constant), o, a, b, m, and q.

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An annulus has inner and outer radii a and b, respectively and carries a
uniform surface charge density o (where sigma is a positive constant, the charge
is distributed between the surface of disk of radius a and disk of radius b.) The
annulus is on the xy plane as shown in the figure. A point positive charge of
q and mass m is released at rest at z = 0 and slightly pushed (i.e., its initial
speed is almost zero and can be ignored). Find the ultimate speed of the charge
at z = o in terms of k (Coulomb's constant), o, a, b, m, and q.
q,m
Select one:
2Tkqo(b – a)
V
Tkqo(b – a)
V
| 4tkqo(b – a)
Transcribed Image Text:An annulus has inner and outer radii a and b, respectively and carries a uniform surface charge density o (where sigma is a positive constant, the charge is distributed between the surface of disk of radius a and disk of radius b.) The annulus is on the xy plane as shown in the figure. A point positive charge of q and mass m is released at rest at z = 0 and slightly pushed (i.e., its initial speed is almost zero and can be ignored). Find the ultimate speed of the charge at z = o in terms of k (Coulomb's constant), o, a, b, m, and q. q,m Select one: 2Tkqo(b – a) V Tkqo(b – a) V | 4tkqo(b – a)
q,m
Select one:
27kqo(b – a)
Tkqo(b – a)
| 4xkqo(b – a}
akqo(b – a)
mab
2mkqo(b – a)
mab
Transcribed Image Text:q,m Select one: 27kqo(b – a) Tkqo(b – a) | 4xkqo(b – a} akqo(b – a) mab 2mkqo(b – a) mab
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