e A small sphere is suspended from a string in a uniform electric field shown by...

Question

Question

science physics

Answer 1

Answer #1

force acting on the ball

1) tension

2) weight

3) electrostatic force

writing the force equations

T cos $\theta$ = mg -----(1)

T sin $\theta$ = qE -----(2)

tan $\theta$ = qE/mg

E = mg tan $\theta$ / q

= 4*10^-3*9.8*tan 40 / 9*10^-9

= 3.65*10^6 N/C

Answer 2

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