1) an electric field is measured at 3.00 × 10^5 n/c at a distance from a source point charge of 3.00 × 10^–6 c. how far is the point from the source charge?

a) 0.60 m

b) 0.30 m

c) 0.09 m

d) 0.36 m

2) in an electric field of strength 0.50 n/c, a test charge experiences a force of 2.50 × 10^–4 n in the same direction as the field. what is the magnitude of the test charge?

a) +5.00 × 10^–4 c

b) –5.00 × 10^–4 c

c) +2.50 × 10^–4 c

d) –2.50 × 10^–4 c