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


Respuesta :

1.a
2. b
i think so those would be the right answers

(1) The distance of the source charge from the point charge is 0.3 m.

(2) The magnitude of the test charge is +5 x 10⁻⁴ C

Position of the source charge

The position of the source charge is caculated as follows;

[tex]E = \frac{kq}{r^2} \\\\r^2 = \frac{kq}{E} \\\\r = \sqrt{\frac{kq}{E} } \\\\ r= \sqrt{\frac{(9\times 10^9)(3\times 10^{-6})}{3 \times 10^{5}} }\\\\r = 0.3 \ m[/tex]

Thus, the position of the source charge is 0.3 m.

Magnitude of the test charge

The magnitude of the test charge is calculated as follows;

E = F/q

q = F/E

q = (2.5 x 10⁻⁴) / (0.5)

q = 5 x 10⁻⁴ C

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