PHYS 18 Microsoft Word-PSWorkSheG theee charges Q-Q.-Q are x stritoned ucsd.edu/

Question

PHYS 18 Microsoft Word-PSWorkSheG theee charges Q-Q.-Q are x stritoned ucsd.edu/bbeswetbdawpid-1324380-dt-content-rid-17491102/courses/pHYS18.$218. A0O/ps. Work Sheet AUGB.pdf Physics 1B -Problem Session Worksheet (8 AUG 2018) 10. Two positively charged particles t nd 8 of sses m aud m respecsively are sspended by two invalaing thireads of the same kth from O Due to the electrostatic nopelsive Seuces betwees d aed B, threads A 80 aske 30 and 6o respectively with dhe verical aws shom Fand the no D 2:1 Ir canmot be foumd as the charge on each particlke is not kw The electic field srength nexr the suarfice of s chaged metal sphese in E. If tbhe clarge ou the phere and its dias are doued wht is the new eleceric ficld strength ner the sphere's saface? CE D. 2E MacBook Pro G Search or type URL 3 5 6 8

Explanation / Answer

10.

D. it can not be found as the charge on each particle is not given

11.

let the charge on sphere initiallt be Q and radius of sphere be "R"

electric field is given as

E = k Q/R2

now charge and radius are doubled

Q' = 2Q and R' = 2 R

new electric field is given as

E' = k Q'/R2'

E' = k (2Q)/(2R)2

E' = (0.5) k Q/R2

E' = (0.5) E

so correct choice is B

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