Question

As shown in the figure, an electron is at the origin and an unknown charge is at +40 nm. If the net electric force on a small positive test chargeistert 2m, what is the magnitude and sign of the unknown charge! Jest charge 9 unknown charge Q electron X-2 nm XO 4 mm 0-9e +0.11e 0 -0.11e 0.4.5e Question 2 The figure shows two protons separated by a distantd. Point P is a distance d/4 from the leftmost charpe. It is equal to 2 m, what is the magnitude of the net electric held at point and which way does it point! prolon 0/4 P proton d 3.3E9N/C, to the right o 7.2E9N/C, to the left 72E9N/C, to the right O 5.1E9N/C, to the left 5.1E9N/C, to the right

Answer 1

9,92 a ATTEO explain, from Coulomb's law Ě = ! charges 41 9x109 m/F so distance bla charges, 9,92 2

same type of charges nepels but opposite type of charges attracts. 1 9 2 x = -2 um 220 x=4um न 94-e) F 22 4&to W qe So, force on a due to electron, due to a , FR = 2 4 42 (-2) where -et charge of direction. Fi 90 electron, and Fue muest be opposite in Fue - Faq 50,

9te) 09 2 A 4nto 6 22 2 e. 22 Q =+9e 4 Answer magnitude of unknown charge option © +ge te P te. 0/4 1 charge of proton = test:6 X10-19 C. d = 2 nm = 2*10-9m е. (+ã). tem E 4 To field force at P due to proton & due to proton 2, E D/A) 2 e (-) - 4TTE R Tela) D]+) ATTEO ".net freld at P Ě Ě + Ea ar È putting numerical values, x9x109 1 1.6 x 10-19 16 (@x104) 2 pe x10-6j2] (ta) Ě = 518109 Nic Answer, field at pt. ♡ optim © JidE9 N/C , to the right