A metal sphere of radius 0.1 m carries 5 10^-9 C. The field strength 0.2 m from its centre is (k = 8.99 10^9 N m^2 C^-2):

  1. 1120 N/C
  2. 562 N/C
  3. 2250 N/C
  4. 4490 N/C
Answer

A) 1120 N/C

Treat the charge as a point at the centre: E = kQr^2 = 1120 N/C (measure r from the centre). SLO P-11-E-05 · Knowledge

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