Object A has an electric charge that is 10 times larger than the charge on object B. When placed near each other, how does the force by A on B compare with the force by B on A?
A) The force by A on B is 10 times smaller.
B) The force by A on B is 100 times larger.
C) The force by A on B is 10 times larger.
D) The force by A on B is 100 times smaller.
E) They are equal.
Question 2
Two long conducting cylindrical shells are coaxial and have radii of 20 mm and 80 mm. The electric potential of the inner conductor, with respect to the outer conductor, is +600 V.
An electron is released from rest at the surface of the outer conductor. What is the speed of the electron as it reaches the inner conductor? (e = 1.60 10-19 C, mel = 9.11 10-31 kg, k = 1/40 = 8.99 109 N m2/C2 )
A) 1.1 107 m/s
B) 1.3 107 m/s
C) 1.5 107 m/s
D) 1.7 107 m/s
E) 1.9 107 m/s
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