The electric field strength 0.05 m from a point charge of 4 10^-8 C in free space is:

  1. 1.44 10^5 N/C
  2. 7190 N/C
  3. 71,900 N/C
  4. 2.88 10^5 N/C
Answer

A) 1.44 10^5 N/C

E = kQr^2 = 8.99 10^9 4 10^-8(0.05)^2 = 1.44 10^5 N/C. SLO P-11-E-08 · Application

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