A point charge 2 × 10-2 C is moved from P to S in a uniform electric field of 30 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

Question

A point charge 2 × 10-2 C is moved from P to S in a uniform electric field of 30 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 (A) 1200 mJ (B) 600 mJ (C) -600 mJ (D) -1200 mJ

Tardigrade Admin · Accepted Answer

<img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/bd835440da3ad26bc78c29b95af5bce8-.png" /> ω E = q vec E ⋅ vec S =2 × 10-2[30 hat i ⋅(- hat i )] =2 × 10-2(-30) =-60 × 10-2 =-(60/100)=-0.6 J =-600 mJ

Q. A point charge $2 \times 1 0^{- 2} C$ is moved from $P$ to $S$ in a uniform electric field of $30 N C^{- 1}$ 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

$1200 m J$

$600 m J$

$- 600 m J$

$- 1200 m J$

$ω_{E} = q E \cdot S$
$= 2 \times 1 0^{- 2} [30 \hat{i} \cdot (- \hat{i})]$
$= 2 \times 1 0^{- 2} (- 30)$
$= - 60 \times 1 0^{- 2}$
$= - \frac{60}{100} = - 0.6 J$
$= - 600 m J$

Q. A point charge 2×10−2C is moved from P to S in a uniform electric field of 30NC−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

1200mJ

600mJ

−600mJ

−1200mJ