A +5.0-?C point charge is placed at the 0 cm mark of a meter stick and a -4.0-?C charge is placed at the 50 cm mark. What is the net electric field at the 30 cm mark? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A) 4.0 × 105 N/C
B) 5.0 × 105 N/C
C) 9.0 × 105 N/C
D) 1.4 × 106 N/C
D
Physics & Space Science
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