PHY222_hw_1_ch21

# PHY222_hw_1_ch21 - Physics 222 Homework#1 on Chapter 21 of...

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Physics 222 Homework #1 on Chapter 21 of text Choose the best answer from each question. Use the following to answer questions 1-2. Figure 1: Two point charges, Q 1 = -1.0 _C and Q 2 = +2.0 _C, are placed as shown. 1. The magnitude of the electric force on either charge is closest to: A) 0.009 N B) 0.005 N C) 0.011 N D) 0.007 N E) 0.013 N 2. A proton is released at the midpoint between Q 1 and Q 2 . The y-component of the acceleration of the proton is closest to: A) -1.3 x 10 12 m/ s 2 D) 1.3 x 10 12 m/ s 2 B) -4.0 x 10 12 m/ s 2 E) -2.7 x 10 12 m/ s 2 C) 2.7 x 10 12 m/ s 2 Use the following to answer questions 3-4. A point charge Q = -12 μ C, and two other charges, q 1 and q 2 , are placed as shown. The electric force components on charge Q are F x = +0.005 N and F y = -0.003 N. 3. The number of excess electrons in charge Q is closest to: A) 6.5 x 10 13 B) 7.5 x 10 13 C) 8.5 x 10 13 D) 5.5 x 10 13 E) 9.5 x 10 13 4. Charge q 1 , in nC, is closest to: A) +600 B) +200 C) -200 D) +400 E)

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## This note was uploaded on 05/10/2009 for the course PHYS PHYSIC 222 taught by Professor O'neil during the Spring '09 term at Fullerton College.

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PHY222_hw_1_ch21 - Physics 222 Homework#1 on Chapter 21 of...

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