Explanation
True for induced electric field and magnetic field.
While drawing the dielectric plate outside, the capacitance decreases till the entire plate comes out and then becomes constant. So, V increases and then becomes constant.
At mid-point, E = 0
Before mid point, E is positive. This is maximum near the charge and decreases towards mid point.
After mid point, E is negative, The curve crosses x-axis at x-axis at x = d/2. From centre to end, decreases. The variation is shown by curve d.
The potential shown is for charged spherical conductor.
Battery is disconnected, hence charge remains conserved. The plates are pulled apart, so capacity will decrease on account of increase of voltage. Now capacity decreases, hence energy will increase as charge is constant.
Thus, (b) and (d) are correct.
Statement I is true by information
Statement II is true by formula.
But Statement II is not the explanation of Statement I.
Gravitational force is the dominating force in nature and not coulomb’s force. Gravitational force is the weakest force. Also. Coulomb’s force >> gravitational force.
In a hollow spherical shield, the charge is present only on its surface but charge is zero at every point inside the hollow sphere. Hence, the metallic shield in form of hollow shell may be built to block an electric field.
Electron has negative charge, in electric field negative charge moves from lower potential to higher potential.
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