1. A mass of 0.02 g and charge O is suspended in air as shown, if the electric f
ID: 1577737 • Letter: 1
Question
1. A mass of 0.02 g and charge O is suspended in air as shown, if the electric field is 4x10s N/C, what is the charge O A) 0.35 nC B) 0.49 nc C)1.8nc D) 13.1nC E) NoP 2. A charged metallic object in electrostatic equilibrium... A) Does not have perpendicular fields on the surface B) does not have charges insideC hfields tangential to the surface D) has charges uniformly distributed E) none of previous is true 3. The molecule of carbon monoxide forms a dipole as shown. What is the magnitude of the torque it feels if the electric field is 10,000 N/C? Zepto (z) is 102. A 1.26x1027 Nm B) 2.39x1027 Nm 3.4zC C) 3.67x1027 Nm D) 4.86x1027 Nm E) None of previous 4. An electron therapy accelerator operates with an electric field of 10,000 N/C, what is the exit velocity of electrons that starts at rest at the negative plate? 4.15x107 m/s B) 3.14x107 m/s C) 2.3x107 m/s D) 1.18x10 m/s E) none of previous 5. A linearly varying electric potential is-300 Vatx-0, and 100 V at x = 5 cm. If a +2 nC charge is released atx 1 cm the charge will Aj move to the right B) move to the leftC not move D) Not enough information to tell d = 4,0 cmExplanation / Answer
1. Fe + Fg = 0
q E + m g = 0
(q) (4 x 10^5) + (0.02 x 10^-3 x 9.8) = 0
q = - 0.49 x 10^-9 C or 0.49 nC
Ans(B)
2. charge will lie on the surface only.
Ans)(B)
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