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Physics 102 Fall 2010 Ashkenasi

# Physics 102 Fall 2010 Ashkenasi - Physics 102 FORM 0[1 Two...

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Physics 102 FORM 0 [1] Two objects, A and B, are rubbed together. As a result, object A acquires an excess negative charge while object B becomes positively charged. In comparison to their masses before the charging process (assuming that no mass was exchanged with the surroundings), you can say that [A] the mass of both objects increased. y|) the mass of A increased and that of B decreased. [C] the mass of A decreased and that of B increased. [D] the mass of both objects decreased. [E] None of the other choices is correct. [2] Two coins carry identical charges. These two coins are lying 1.50 m apart on a table. If each of these coins experiences a force of 2.00 N, how large is the charge on each coin? [A] 2.24 fiC [B] 4.47 ^C [C] 8.71 ^C /[l5}22.4 pC [E] 44.7 /*C [3] Two point charges of +20.0 ^iC and +14.0 /iC are placed inside a cube of edge length 0.100 m. The net electric flux, through the surface of the cube, due to these charges is given by [A] 1.14 x 10 5 Nm 2 /C jBl 3.40 x 10 s Nm 2 /C [C] 4.50 x 10 s Nm 2 /C [D] 1.92 x 10 6 Nm 2 /C QEJ/3.84 x 10 6 Nm 2 /C [4] An 800 V/m constant electric field is directed along the +x-axis. If the potential at x - 0.00 m is 2000 V, what is the potential at x = 2.00 m?

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Physics 102 Fall 2010 Ashkenasi - Physics 102 FORM 0[1 Two...

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