PHYS-2523 Home work # 1 e: Assignments may be open-answer problems OR multiple-c
ID: 1779319 • Letter: P
Question
PHYS-2523 Home work # 1 e: Assignments may be open-answer problems OR multiple-choice questions OR a combination of multiple-choice questions and open-answer problems. Please, select the dnswer (in the case of multiple-choice questions) OR fill in the blanks with correct answer (in the case of open-answer problems). 1) Two identical small conducting diff 10.8N. The total charge spheres are separated by 0.60 m. The spheres carry 10.8N. The by a slender ofcharge and each sphere experiences an attractive electric force of total charge on the two spheres is-24 d. The two spheres are now connected osest to cucting wire, which is then removed. The electric force on each sphere is A) zero. B) 3.6 N, attractive. C) 5.4 N, attractive. D) 3.6 N, repulsive. E) 5.4 N, repulsive. 2) Three point charges are placed on the r-axis. A charge of +2.0 C is placed at the origin,-2.0 C to the right at x = 50 cm, and +4.0 pC atthe 100 cm mark. What are the magnitude and direction of the electrostatic force that acts on the charge at the origin? (k = 1/4m0-8.99 x 109 N-m2/C2) Answer: 3) The point charge at the bottom of the figure is Q 17 nC, and the curve is a circular aic. What is the magnitude of the force on the charge Q due to the other point charges shown? (k-1/40 = 8.99% 109 N-m202) -6.0 nC 20 nC 5.0 crn", 45°:45,' 5.0 cm A) 1.9 x 10-4 N B) 1.2×10-4 N C) 1.6 x 10-4 N D) 2.3 x 10-4 NExplanation / Answer
1) F = k q1 q2 / r^2
when they are connected and removed then both will posses same charge.
q = (q1 + q2)/2 = - 12 uC
F = k q^2 / r^2
F = (9x 10^9) (12 x 10^-6)^2 / 0.60^2
F = 3.6 N repulsive
( because both charges are of same sigm (neg))
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