Page1 / 4

HW1 - MULTIPLE CHOICE. Choose the one alternative that best...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon

HW1 - MULTIPLE CHOICE. Choose the one alternative that best...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Figure 21.1a 1) A point charge Q = - 800 nC and two unknown point charges, q 1 and q 2 , are placed as shown. The electric field at the origin O , due to charges Q , q 1 , and q 2 , is equal to zero. In Fig. 21.1a, the number of excess electrons in charge Q is closest to: 1) A) 8.7 × 10 12 B) 6.2 × 10 12 C) 5.0 × 10 12 D) 1.0 × 10 13 E) 7.5 × 10 12 2) Which of the following statements about electric field lines due to a charge arrangement are correct? (There may be more than one correct choice.) 2) A) Charges must move along these field lines. B) They can never cross. C) If the electric force on an electron points upward at a point, the direction of the electric field is downward at that point. D) They point away from negative charges. E) The more closely the lines are spaced, the stronger the electric field. 3) Two uncharged metal spheres, #1 and #2, are mounted on insulating support rods. A third metal sphere, carrying a positive charge, is then placed near #2. Now a copper wire is momentarily connected between #1 and #2 and then removed. Finally, sphere #3 is removed. In this final state
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.
Ask a homework question - tutors are online