7 Current Electricity questions from real MDCAT past papers (2020), each with the correct answer and a written explanation.
If the potential at a point which is 1m from a charge is 1 volt, them the potential at a pont which is 2m from the same charge will be:
Explanation
Electric potential V due to point charge varies as 1/r (V = kQ/r). Doubling the distance halves the potential, so 1 V → 0.5 V at 2 m.
The values of electric intensity will due to the presence of dielectric medium:
Explanation
A dielectric reduces the effective electric field (electric intensity) within a capacitor for the same free charge because bound charges oppose the field; thus the field/PD is reduced if charge is held constant.
5 more questions in this chapter
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In transmission from grid station, power losses are maximized by:
Answer and explanation locked
In capacitors, energy is stored in the form of:
Answer and explanation locked
Ohm time’s farad is equivalent to:
Answer and explanation locked
When a wire is compressed and its radius becomes 2R then its resistance will be:
Answer and explanation locked
One of the following is an ohmicdevie:
Answer and explanation locked
Current Electricity sits in the official PMDC Physics curriculum, the document that defines what can and cannot appear in the 2026 paper. Everything on this page is tagged against that curriculum rather than against a chapter list invented for a website, which is why a chapter here matches the chapter your textbook and your teacher use.
Physics carries 36 of the 180 questions in the real paper - 20% of your MDCAT score, and the MDCAT is half your merit aggregate. PMDC does not publish how those 36questions are split across chapters, so no honest page can tell you “expect four from Current Electricity”. What the archive can tell you is what actually appeared: 7 Current Electricity questions out of the 37 Physics questions digitised so far.
Work through them with the explanations rather than checking answer letters. The explanation says why the other three options are wrong, and distractors get reused across years far more reliably than whole questions do.