MDCAT Physics — Electrostatics
Electrostatics is a core Physics topic in the PMDC MDCAT syllabus, covering 8 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (8)
- Capacitance
- Charging and Discharging of Capacitor
- Combination
- Coulomb's Law
- Electric Field
- Electric Forces
- Electric Potential Energy and Potential
- Potential
How Electrostatics is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Electrostatics accounts for 48 questions. It appears in 15 of them, about 3.2 questions a paper. The heaviest was MDCAT 2024, with 7 questions, and the most recent is MDCAT 2025, with 4.
| Paper | Questions |
|---|---|
| MDCAT 2025 | 4 |
| MDCAT 2024 | 7 |
| MDCAT 2023 | 4 |
| MDCAT 2022 | 5 |
| MDCAT 2019 | 4 |
| MDCAT 2018 | 3 |
| MDCAT 2017 | 3 |
| MDCAT 2016 | 3 |
| MDCAT 2015 | 1 |
| MDCAT 2014 | 2 |
| MDCAT 2013 | 1 |
| MDCAT 2012 | 3 |
| MDCAT 2010 | 4 |
| MDCAT 2009 | 3 |
| MDCAT 2008 | 1 |
Electrostatics MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2025 · Electrostatics
The electric field at a point due to two equal and opposite charges is 100 N/C. If the magnitude of each charge is doubled, the electric field at that point becomes:
- A.50 N/C
- B.100 N/C
- C.200 N/C
- D.400 N/C
Show answer
Answer: C. 200 N/C — Electric field is directly proportional to charge, so doubling both charges doubles the field: 100 N/C becomes 200 N/C.
- Q2 · MDCAT 2024 · Electrostatics
The Coulomb's law states
- A.Force between two point charges is inversely proportional to the product of the charges and directly proportional to the square of the distance between them
- B.Force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them
- C.Force between two point charges is directly proportional to the sum of the charges and inversely proportional to the square of the distance between them
- D.Force between two point charges is directly proportional to the product of the charges and the square of the distance between them
Show answer
Answer: B. Force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them — Coulomb's law: force between two point charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
- Q3 · MDCAT 2023 · Electrostatics
To store the electric charge the ultra-capacitors use ______ effect.
- A.Single layer
- B.Double layer
- C.Triple layer
- D.Quadruple layer
Show answer
Answer: B. Double layer — Ultra-capacitors (supercapacitors) store charge using the electric double-layer effect.