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Physics: Electric Field, strength, charge, intensity
The answers are included but the workings are needed.
Electric Field
1. What is the field strength at a reference point if a force of 40N is necessary to hold a charge of 200uC at that point?
Answer: 2 x 105 N/C
2. A charge of -2 x 10-9C in an electric field between two parallel metal plates 4cm apart is acted upon by a force of 10-4N. What is the strength of the field?
Answer: 5 x 104 V/m
3. Find the electric field intensity at a point P midway between two charges of +2.0 x 10-7C if they are 100cm apart?
Answer: 1.44x 104 N/C