UNIT 08: ELECTROSTATICS

IElectrostatics is a core chapter in MDCAT Physics, sitting within the 20% Physics allocation of your 36-question paper.

What this chapter covers:

• Coulomb’s law and force between two-point charges in a medium other than free space
• The concept of an electric field as an example of a field of force
• Electric field intensity due to a point charge and its representation by field lines
• Magnitude and direction of the electric field at a point due to two charges with the same or opposite signs
• Sketching electric field lines for two-point charges of equal magnitude with same or opposite signs
• Electric field intensity due to an infinite sheet of charges
• Electric field due to an infinite size conducting plate of positive or negative charge
• Electric potential energy and potential due to a point charge, defined as work done bringing a unit positive charge from infinity
• The unit of electric potential
• Derivation of the expression for electric potential at a point due to a point charge
• Charging and discharging of a capacitor through a resistance

This chapter blends conceptual understanding with steady calculation work, moving from force and field relationships through potential concepts into capacitor charging and discharging behavior. Given the PMDC split of 15% easy, 70% moderate, and 15% difficult questions, expect this chapter to test both clear conceptual grasp of fields and potential, and confident handling of formula-based numericals.

Why this practice set helps:

• Covers every subtopic the PMDC curriculum identifies, plus the supporting concepts textbooks present alongside them
• Every question includes a full explanation of why the correct answer is right and why each other option is wrong
• Built to help you learn faster than passive reading, with nothing the exam may draw from left untouched

Work through this set attentively, and you build both the conceptual clarity and calculation precision this chapter demands.