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Ex1sm03b

# Ex1sm03b - EXAM 1 B PHYS 121 SUMMER 2003 SCORE NAME The...

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EXAM 1 B PHYS 121 SUMMER 2003 SCORE_________________ NAME___________________________________________________________________________ ________________________________________________________________________________________________ The exam is closed book and closed notes. Make sure you put your name on the SCANTRON form. e = 1.6x10 -19 C; m e = 9.11x10 -31 kg k = 8.99x10 9 Nm 2 /C 2 ; k = 1 4 0 πε ; ε 0 = 8.85x10 -12 C 2 / Nm 2 ; F = k q q r 1 2 2 ; E = k q r 1 2 ; F = qE F = ma x = v 0 t + 1/2 at 2 1. A 2-nC charge is placed at the origin, an identical charge is placed 0.002 m from the origin on the x axis, and a third identical charge is placed 0.002 m from the origin on the y axis. The magnitude of the force on the charge at the origin is A. 0.013 N B. 0.034 N C. 0.568 N D. 0.890 N E. 1.021 N ________________________________________________________________________________________ 2. Charges Q, -Q, and q are placed at the vertices of an equilateral triangle as shown. The total force exerted on the charge q is: ________________________________________________________________________________________

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Ex1sm03b - EXAM 1 B PHYS 121 SUMMER 2003 SCORE NAME The...

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