Question

As shown in the figure, an electron is at the origin and an unknown charge is at x = +4.0 nm. If the net electric force on a small positive test charge is zero at x = -2 nm, what is the magnitude and sign of the unknown charge? test charge q unknown charge Q electron X=-2 nm x=0 x=+4 nm O-9e O +9e 0 +0.11e 0 -0.11e O -4.5e Question 2 5 pts The figure below shows a proton and an electron separated by a distant d. Point P is a distance d/4 from the leftmost charge. If d is equal to 4 nm, what is the magnitude of the net electric field at point P, and which way does it point? proton d/4 P electron d 05.1E9 N/C, to the right O 5.1E9 N/C, to the left 7.2E9 N/C, to the right O 1.6E9 N/C, to the left O 1.6E9N/C, to the right

Answer 1

a electron o o k zum k fum as the electron attract a, So, het force on test charge will be zero. only, is a is positive fret -O ka q (6hmp kae (2nm 1? - - KQq (6nmi? кче (22m1² a קו have A = tge