Question 429: Electrostats & Capacitance

Question

A point charge $$2	imes10^{-2}~\mathrm{C}$$ is moved from P to S in a uniform electric field of $$30~\mathrm{NC^{-1}}$$ directed along positive x-axis. If coordinates of P and S are (1, 2, 0) m and (0, 0, 0) m respectively, the work done by electric field will be

Accepted Answer

$$w = \int {F\,.\,ds} $$
$$\overrightarrow F  = q\overrightarrow E  = 2 	imes {10^{ - 2}} 	imes 30\widehat i = 0.6N\widehat i$$
$$w = \overrightarrow F .\overrightarrow d  = (0.6\widehat i)\,.\,( - \widehat i, - 2\widehat j)$$
$$ =  - 0.6$$ J
$$ =  - 600$$ mJ

Answer

600 mJ

Answer

$$-1200$$ mJ

Answer

1200 mJ

Answer

$$-600$$ mJ

Electrostats & Capacitance

A point charge $2\times10^{-2}~\mathrm{C} is moved from P to S in a uniform electric field of 30~\mathrm{NC^{-1}}$ directed along positive x-axis. If coordinates of P and S are (1, 2, 0) m and (0, 0, 0) m respectively, the work done by electric field will be

Choose the correct answer: