MULTIPLE CHOICE. Choose the one alternative that best completes the statement or

Question

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Two very large parallel metal plates, separated by 0.20 m, are connected across a 12-V source of potential. An eiectron is released from rest at a location O.10 m from the negative plate. When the electron arrives at a distance 0.050 m from the positive plate, how much kinetic energy has the electron gained? (e-1.60 x 10 19C) A) 4.8 x 10- 19 B) 2.4 x 10 19 O 9.6 x 10-19 D) 7.2 x 10- 19J 2) Two tinv erains of sand having charges of 4.0 uC and -4.0 uC are situated along the x- axis at x1-2.0 m and x2 =-20 m. What is electric potential energy of these grains relative to infinity? (k-1Anena 90 x 109 N-m02) A) -36 ml C) 36 m] D) 72 mJ E) -72 m 3) Four charged particles (two having a charge +0 and two having a charge -) are arranged in the zy- plane as shown in the figure. The charges are all equidistant from the origin. The amount of work positively charged particle from point P to point O (both of which are on the z axisi is required to move a A) necative. B) zero. positive. D) depends on the path in which the charged is moved. 4) If the electric potential at a point in space is zero. then the electric field at that point must be Ai zero. B) negative. unitorm. vosinve. npossipie to determine based on the information given.

Explanation / Answer

1) KE gained = q deltaV

= (1.602 x 10^-19)(0.05 x 12)

= 9.6 x 10^-20 J

No option mactches. ( BUt you can select C, I think its -19 by mistake instead of -20)

2) Pe = k q1 q2 / d = - 0.036 J = - 36 mJ

Ans(A)

3) (A) negative

4) (e) impossible to determined from given information

Related Questions

Navigate

• Browse (All)
• Browse M
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.