Electric field lines contract lengthwise because they represent the force experienced by a positive test charge in the field. This contraction indicates the attraction between opposite charges, as field lines always originate from positive charges and terminate at negative charges, ...

When a neutral balloon is charged, its size increases. This happens because like charges repel, causing the charged particles on the balloon’s surface to push apart. This increases the internal electrostatic pressure, slightly expanding the balloon. Thus, the correct answer ...

According to Gauss’s Law, the total electric flux (Φ) through a closed surface is given by: Φ = Qenclosed/ε0 ​where Qₑ is the total charge enclosed within the surface. The total charge enclosed is: Q enclosed = (+8Q) + (-3Q) ...

The electric field due to an electric dipole is not spherically symmetric because it depends on both the distance from the dipole and the angle with respect to the dipole axis. Instead, it has a distinct pattern with stronger fields ...

The cause of the quantization of electric charge is the transfer of an integral number of electrons. Charge is always transferred in discrete units of the elementary charge (e), where e = 1.6 × 10⁻¹⁹ C. Since electrons are the ...

When a plastic comb is passed through dry hair, it always acquires a negative charge. This happens because electrons are transferred from the hair to the plastic comb due to the triboelectric effect. Since hair loses electrons, it becomes positively ...

For a short electric dipole, the electric field on the axial line (Eₐ) is twice the electric field on the equatorial line (Eₑ) at the same distance from the center of the dipole. Thus, the correct answer is (a) 2.

The electric field due to a single point charge is spherically symmetric because the field radiates uniformly outward (for a positive charge) or inward (for a negative charge) in all directions from the charge. The magnitude of the field depends ...

The equation q₁ + q₂ = 0 signifies that the two charges are equal in magnitude but opposite in sign, meaning they form an electric dipole. An electric dipole consists of a pair of equal and opposite charges separated by ...

The SI unit of the surface integral of the electric field is Nm²C⁻¹. This follows from Gauss’s law, which states that the surface integral of the electric field over a closed surface equals the enclosed charge divided by the permittivity ...