NEET · Physics · Electrostatics doubts
10 doubts found
What does “Coulomb's law” actually mean in Electrostatics, and why does it matter for NEET?
the force between two point charges, F = kq₁q₂/r², along the line joining them.
I keep getting “Coulomb's law” questions wrong in Electrostatics. What's the trap?
ignoring that like charges repel and unlike attract when assigning direction.
What does “Electric field” actually mean in Electrostatics, and why does it matter for NEET?
the force per unit positive charge, E = F/q; field lines point away from positive charges.
I keep getting “Electric field” questions wrong in Electrostatics. What's the trap?
treating field (a vector) and potential (a scalar) as the same thing.
What does “Electric potential” actually mean in Electrostatics, and why does it matter for NEET?
the work done per unit charge to bring a charge from infinity to a point, V = kQ/r.
I keep getting “Electric potential” questions wrong in Electrostatics. What's the trap?
thinking zero field means zero potential (or vice versa).
What does “Capacitance” actually mean in Electrostatics, and why does it matter for NEET?
a capacitor's ability to store charge per volt, C = Q/V; for parallel plates C = ε₀A/d.
I keep getting “Capacitance” questions wrong in Electrostatics. What's the trap?
forgetting a dielectric increases capacitance.
What is the difference between electric field and electric potential?
Field is a vector (force per charge, N/C); potential is a scalar (energy per charge, volts) — field points from high to low potential.
What is the difference between capacitors in series and capacitors in parallel?
In series the charge is the same and 1/C adds (total C smaller); in parallel the voltage is the same and C adds (total C larger).