MDCAT Physics — Measurements
Measurements is a core Physics topic in the PMDC MDCAT syllabus, covering 3 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (3)
- Dimensional Analysis
- Dimensions
- Measurements & Units
How Measurements is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Measurements accounts for 7 questions. It appears in 4 of them, about 1.8 questions a paper. The heaviest was MDCAT 2008, with 3 questions, and the most recent is MDCAT 2011, with 1.
| Paper | Questions |
|---|---|
| MDCAT 2011 | 1 |
| MDCAT 2010 | 2 |
| MDCAT 2009 | 1 |
| MDCAT 2008 | 3 |
Measurements MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2011 · Measurements
When the dimensions of both sides of an equation are equal, then the equation is said to be
- A.Simultaneous
- B.Homologous
- C.Instantaneous
- D.Quadratic
Show answer
Answer: B. Homologous — When both sides of an equation have identical dimensions, the equation is dimensionally consistent — the textbook term for this is 'dimensionally homogeneous', printed here as 'Homologous'.
- Q2 · MDCAT 2010 · Measurements
Which one is the highest power multiple?
- A.Giga
- B.Tera
- C.Mega
- D.Deca
Show answer
Answer: B. Tera — Tera is the highest of the listed SI prefixes.
- Q3 · MDCAT 2009 · Measurements
The dimensions of gravitational constant “G” are:
- A.[ML⁻²T⁻¹]
- B.[M²L⁻²T⁻¹]
- C.[ML⁻²T⁻²]
- D.[M⁻¹L³T⁻²]
Show answer
Answer: D. [M⁻¹L³T⁻²] — From F = Gm₁m₂/r², G's dimensions work out to [M⁻¹L³T⁻²].