MDCAT Physics — Electromagnetic Induction
Electromagnetic Induction is a core Physics topic in the PMDC MDCAT syllabus, covering 5 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (5)
- Electromagnetic Induction & AC
- Faraday's Law
- Lenz's Law
- Reactance
- Transformer
How Electromagnetic Induction is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Electromagnetic Induction accounts for 25 questions. It appears in 10 of them, about 2.5 questions a paper. The heaviest was MDCAT 2022, with 5 questions, and the most recent is MDCAT 2025, with 2.
| Paper | Questions |
|---|---|
| MDCAT 2025 | 2 |
| MDCAT 2024 | 3 |
| MDCAT 2023 | 2 |
| MDCAT 2022 | 5 |
| MDCAT 2019 | 2 |
| MDCAT 2018 | 2 |
| MDCAT 2016 | 4 |
| MDCAT 2010 | 1 |
| MDCAT 2009 | 2 |
| MDCAT 2008 | 2 |
Electromagnetic Induction MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2025 · Electromagnetic Induction
In an ideal transformer, if the primary voltage is doubled and the turns ratio remains the same, what happens to the secondary current?
- A.Doubles
- B.Halves
- C.Remains the same
- D.Becomes four times
Show answer
Answer: A. Doubles — Doubling the primary voltage (with the same turns ratio) doubles the secondary current — assuming constant secondary resistance/load, or if referring to output relative to a fixed load, the current doubles proportionally to voltage.
- Q2 · MDCAT 2024 · Electromagnetic Induction
The induced current will flow in such a direction so as to oppose the cause that produces it is statement of:
- A.Ampere's Law
- B.Faraday's Law
- C.Lenz's Law
- D.Joule's Law
Show answer
Answer: C. Lenz's Law — This 'induced current opposes its cause' statement is Lenz's Law.
- Q3 · MDCAT 2023 · Electromagnetic Induction
In principle, the transformer consists of two coils of copper, electrically insulated from each other, wound on the same:
- A.Iron core
- B.Copper core
- C.Gold core
- D.Steel core
Show answer
Answer: A. Iron core — A transformer's two coils are wound on a shared iron core, which efficiently channels the magnetic flux between them.