1
JEE Main 2023 (Online) 29th January Evening Shift
+4
-1 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

A
600 mJ
B
$$-1200$$ mJ
C
1200 mJ
D
$$-600$$ mJ
2
JEE Main 2023 (Online) 29th January Morning Shift
+4
-1

In a cuboid of dimension $$2 \mathrm{~L} \times 2 \mathrm{~L} \times \mathrm{L}$$, a charge $$q$$ is placed at the center of the surface '$$\mathrm{S}$$' having area of $$4 \mathrm{~L}^{2}$$. The flux through the opposite surface to '$$\mathrm{S}$$' is given by

A
$$\frac{q}{2 \epsilon_{0}}$$
B
$$\frac{q}{3 \epsilon_{0}}$$
C
$$\frac{q}{12 \epsilon_{0}}$$
D
$$\frac{q}{6 \in_{0}}$$
3
JEE Main 2023 (Online) 25th January Evening Shift
+4
-1 A point charge of 10 $$\mu$$C is placed at the origin. At what location on the X-axis should a point charge of 40 $$\mu$$C be placed so that the net electric field is zero at $$x=2$$cm on the X-axis?

A
$$x=6$$ cm
B
$$x=8$$ cm
C
$$x=4$$ cm
D
$$x=-4$$ cm
4
JEE Main 2023 (Online) 24th January Evening Shift
+4
-1 The electric potential at the centre of two concentric half rings of radii R$$_1$$ and R$$_2$$, having same linear charge density $$\lambda$$ is : A
$$\frac{\lambda}{2\in_0}$$
B
$$\frac{\lambda}{\in_0}$$
C
$$\frac{2\lambda}{\in_0}$$
D
$$\frac{\lambda}{4\in_0}$$
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