What is the strength of the electric field 4.4 cm from a small plastic bead that...

Question

Question

What is the strength of the electric field 4.4 cm from a small plastic bead that has been charged to -7.2 nC ?

Express your answer to two significant figures and include the appropriate units.

science physics

Answer 1

Answer #1

As per question i use E = kQ/r^2

so k = 9 x 10^ 9

Q = -7.2 nC = -0.0000072 C

r = 4.4 cm

so E = 9 x 10^ 9 *-0.0000072 C /19.36

E = 3.34711 × 10³

Answer 2

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