Coulombs Law Quiz: Test Your Knowledge Of Electric Forces

Coulomb’s law applies to electrostatic forces between charges. It is the electric analogue of an inverse-square interaction.

Larger charges produce stronger forces, while greater separation weakens the force. Distance has a strong effect because the relationship is inverse-square.

Coulomb force scales like (1/r^2). Doubling (r) makes the force four times weaker.

Net force is (F = qE). If (E = 0), then net force is zero regardless of small test charge.

Each charge contributes its own force/field. The net effect is the vector sum of all contributions.

If there were a field inside, charges would keep moving. Equilibrium is reached when internal field vanishes.

Coulomb force weakens rapidly with distance as (1/r^2). This is why electrostatic effects drop off quickly with separation.

Coulomb’s law force is proportional to (q1 * q2). Doubling one charge doubles the product and thus the force.

Polarisation creates separated charges inside the neutral object. The closer opposite charges experience a stronger force, leading to net attraction.

Electric charge underlies electrostatics and current electricity. Understanding charge helps explain forces, fields, and many everyday phenomena.

Like charges repel, pushing apart. Opposite charges attract.

Field describes how a charge would be pushed at that point. It is defined as (E = F/q) for a small positive test charge.

Field direction is defined by the force on a positive charge. A negative charge feels force opposite the field direction.

Charges in the conductor rearrange, placing opposite charge closer to the external charge. The nearer attraction outweighs farther repulsion, giving net attraction.

Free charges move until the internal electric field is zero. This leads excess charge to settle on the surface.

By convention, field lines show the direction a positive test charge would move. That means away from positive and into negative charges.

Opposite charges attract. Opposite signs produce attraction. This is a basic rule for electrostatic interactions.

Smaller separation increases the (1/r^2) value, strengthening the force. This is true for both attraction and repulsion.

Each charge creates a field independent of the others. The net field is the vector sum of the individual fields.

Many fundamental interactions spread out over spherical surfaces whose area grows as (r^2). That geometric spreading leads to inverse-square behaviour.