A point charge of 6.0 nC is placed at the center of a hollow spherical conductor (inner radius = 1.0 cm, outer radius = 2.0 cm) which has a net charge of ?4.0 nC. Determine the resulting charge density on the inner surface of the conducting sphere
a. +4.8 ?C/m2
b. ?4.8 ?C/m2
c. ?9.5 ?C/m2
d. +9.5 ?C/m2
e. ?8.0 ?C/m2
b
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Indicate whether the statement is true or false
Under which circumstances can you be sure that the thermal pressure within a gas cloud is increasing?
A) The cloud's temperature and density are both increasing. B) The cloud's temperature is increasing and its density is decreasing. C) The cloud's temperature and density are both decreasing. D) The cloud's temperature is decreasing and its density is increasing. E) It is impossible to say.
The magnetic field at a point P, a certain distance from a long wire carrying a current of 2.0 A, is 1.2 × 10-6 T. How far is P from the center of the wire?
A) 11 cm B) 22 cm C) 33 cm D) 44 cm E) 55 cm
Determine the energy stored in C1 when C1 = 10 ?F, C2 = 12 ?F, C3 = 15 ?F, and V0 = 70 V
a.
6.5 mJ
b.
5.1 mJ
c.
3.9 mJ
d.
8.0 mJ
e.
9.8 mJ