MDCAT Physics — Current Electricity
Current Electricity is a core Physics topic in the PMDC MDCAT syllabus, covering 10 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (10)
- Combination
- Electric Power and Heating Effect
- Galvanometer and Ammeter/Voltmeter Conversion
- Internal Resistance of Sources
- Kirchhoff
- Ohm's Law
- Power
- Rectification (Half and Full Wave)
- Resistivity and Temperature Coefficient
- Steady Current
How Current Electricity is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Current Electricity accounts for 56 questions. It appears in 15 of them, about 3.7 questions a paper. The heaviest was MDCAT 2023, with 6 questions, and the most recent is MDCAT 2025, with 4.
| Paper | Questions |
|---|---|
| MDCAT 2025 | 4 |
| MDCAT 2024 | 5 |
| MDCAT 2023 | 6 |
| MDCAT 2022 | 6 |
| MDCAT 2019 | 3 |
| MDCAT 2018 | 4 |
| MDCAT 2017 | 6 |
| MDCAT 2016 | 1 |
| MDCAT 2015 | 2 |
| MDCAT 2014 | 1 |
| MDCAT 2013 | 2 |
| MDCAT 2011 | 3 |
| MDCAT 2010 | 3 |
| MDCAT 2009 | 5 |
| MDCAT 2008 | 5 |
Current Electricity MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2025 · Current Electricity
The reciprocal of the resistivity of a material is called its:
- A.Impedance
- B.Conductivity
- C.Admittance
- D.Reactance
Show answer
Answer: B. Conductivity — The reciprocal of resistivity is conductivity.
- Q2 · MDCAT 2024 · Current Electricity
A charge of 90 C passes through a wire for 30 seconds. Then the current in the wire will be:
- A.3A
- B.0.3A
- C.3mA
- D.0.3mA
Show answer
Answer: A. 3A — Current = Charge/time = 90C / 30s = 3A.
- Q3 · MDCAT 2023 · Current Electricity
The following formula can be used to determine the resistance of a length of conductor. R = ρl/A. In the formula, the symbol ρ stands for the:
- A.Cross-sectional area of the conductor in m²
- B.Product of the length of the conductor in meters
- C.Resistivity of the material in units of ohm-meters
- D.Resistance of the conductor in units of ohms per meter
Show answer
Answer: C. Resistivity of the material in units of ohm-meters — In R = ρL/A, the symbol ρ (rho) represents the resistivity of the material, measured in ohm-meters.