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Practice exam questions for physics 2220, focusing on electric fields and charges. Topics include calculating electric fields and acceleration of charges, finding tension in conductors, and determining electric potential and flux. Students are required to use unit vector notation and apply concepts of coulomb's law and electric potential.
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5 x 10 5 V, how much work must an external agent do to move a 6 μC charge from an infinite distance to the center of the ring?
Answers: (1) 2 x 10 7 N/C i (2) -3.51 x 10 18 m/s 2 i (3) 0.36 N
(4) i) 0; ii) kQ/r 2 ; iii) 0; iv) 2kQ/r 2
(5) -Q inner, +2Q outer (6) -8.85 x 10 -10^ C/m 2
(7) 1.41 x 10 5 Nm 2 /C, 1.25 x 10 -6^ C (8) 6.33 x 10 -8^ s
(9) U = 5.41 kQ 2 /L joules and V = 5.66 kQ/L volts
(10) 6 V (11) 3.39 x 10 4 m/s (12) V = kQ/R (13) V = kQ/1.41R
(14) 3 J