ECAT Physics Chapter 1 MCQs - Measurements

Chapter 1 (Measurements) is one of the most important chapters in ECAT Physics. Every year, multiple questions appear from this chapter in the actual exam. Practice these solved MCQs covering SI Units, Significant Figures, Dimensional Analysis, Errors & Uncertainties to strengthen your preparation. All questions include correct answers and detailed explanations written by experts.

10+ MCQs With Answers Explanations Updated 2026
SI Units Significant Figures Dimensional Analysis Errors & Uncertainties Vernier Caliper

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We have carefully curated MCQs from Chapter 1 (Measurements) following the official ECAT 2026 syllabus. Each question comes with the correct answer and detailed explanation.

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Measurements - Solved MCQs with Explanations

Below are important MCQs from ECAT Physics Chapter 1 (Measurements). Each question includes the correct answer highlighted in green and a detailed explanation to help you understand the concept.

Q1 Easy SI Units

SI unit of force is:

A Dyne
B Newton
C Joule
D Watt
Explanation

The Newton (N) = 1 kg.m/s^2. Named after Sir Isaac Newton, it measures force in the SI system.

Q2 Medium Significant Figures

Significant figures in 0.00340:

A 2
B 3
C 5
D 6
Explanation

Leading zeros are not significant. 3, 4, and trailing 0 are significant = 3 sig figs. The trailing zero indicates precision.

Q3 Easy Dimensional Analysis

Dimensional analysis is used to:

A Measure temperature
B Check equation correctness
C Measure mass
D Calculate speed of light
Explanation

Dimensional analysis verifies equations by checking if both sides have the same dimensions. If dimensions mismatch, the equation is wrong.

Q4 Easy Vernier Caliper

Least count of Vernier caliper:

A 0.01 mm
B 0.1 mm
C 0.01 cm
D 1 mm
Explanation

Standard Vernier caliper: 1 main scale div - 1 Vernier div = 1mm - 0.9mm = 0.1mm = 0.01cm.

Q5 Easy SI Units

Which is a derived unit?

A Kilogram
B Meter
C Second
D Newton
Explanation

Newton (kg.m/s^2) is derived from base units. The 7 SI base units are: kg, m, s, A, K, mol, cd.

Q6 Medium Errors & Uncertainties

Systematic errors are removed by:

A More readings
B Calibrating instruments
C Random methods
D Ignoring them
Explanation

Systematic errors are consistent and unidirectional. They are removed by calibration, correct techniques, and applying corrections.

Q7 Medium Dimensional Analysis

Dimension of velocity:

A [MLT^-1]
B [LT^-1]
C [MLT^-2]
D [L^2T^-1]
Explanation

Velocity = displacement/time. [L]/[T] = [LT^-1]. No mass dimension since velocity is a kinematic quantity.

Q8 Easy Vernier Caliper

Smallest measurement by an instrument:

A Accuracy
B Precision
C Least count
D Sensitivity
Explanation

Least count = smallest measurement an instrument can make. E.g., ruler with mm markings has least count of 1mm.

Q9 Easy SI Units

Prefix for 10^-9:

A Micro
B Nano
C Pico
D Milli
Explanation

Nano (n) = 10^-9. Prefixes: milli=10^-3, micro=10^-6, nano=10^-9, pico=10^-12.

Q10 Medium Errors & Uncertainties

Random errors are minimized by:

A Better instruments
B Average of multiple readings
C Single measurement
D Changing observer
Explanation

Random errors are unpredictable fluctuations minimized by taking multiple readings and averaging. This reduces individual random variations.

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What You'll Learn in Measurements

Measurements is a fundamental chapter in ECAT Physics. This chapter covers the following important topics that frequently appear in the ECAT exam:

By practicing these MCQs, you will develop a strong understanding of Measurements concepts and be well-prepared for the ECAT 2026 exam.

How to Prepare Measurements for ECAT 2026

Follow these expert tips to master Measurements and score maximum marks in ECAT:

  1. Read the textbook carefully - Cover all concepts in Chapter 1 (Measurements) from your Physics textbook first.
  2. Make short notes - Write down key definitions, formulas, and important points for quick revision.
  3. Practice MCQs daily - Solve at least 20-30 MCQs from Measurements every day using Apna MCQs platform.
  4. Review explanations - Read the detailed explanations for each MCQ to understand the concept, not just memorize answers.
  5. Take timed tests - Practice under exam conditions using our ECAT mock tests to improve speed and accuracy.
  6. Focus on weak areas - Identify topics in Measurements where you score low and practice more MCQs on those specific topics.

Important Topics in Measurements for ECAT

Based on analysis of past ECAT papers, these topics from Chapter 1 (Measurements) are most frequently tested:

SI Units High frequency in ECAT
Significant Figures Very High frequency in ECAT
Dimensional Analysis Medium frequency in ECAT
Errors & Uncertainties High frequency in ECAT
Vernier Caliper Medium frequency in ECAT

Frequently Asked Questions

How many MCQs come from Measurements in ECAT 2026?

In ECAT, Physics typically has 100 total MCQs. Chapter 1 (Measurements) usually contributes 3-5 MCQs in the actual exam. On Apna MCQs, we provide 10+ practice MCQs with detailed explanations for thorough preparation.

Are these ECAT Physics Chapter 1 MCQs updated for 2026?

Yes! All MCQs on Apna MCQs are updated according to the latest Various Universities ECAT 2026 syllabus. Our team of expert educators regularly reviews and adds new questions based on the latest exam patterns and past papers.

What topics are covered in Measurements MCQs?

Our Measurements MCQs cover all important topics including SI Units, Significant Figures, Dimensional Analysis and more. Each topic has multiple MCQs ranging from easy to hard difficulty to ensure comprehensive preparation.

How to prepare Measurements for ECAT?

To prepare Measurements for ECAT: 1) Read the textbook thoroughly, 2) Make notes of key concepts, 3) Practice MCQs on Apna MCQs with explanations, 4) Take mock tests, 5) Review weak areas. Our chapter-wise approach ensures you cover all 15 chapters systematically.

Where can I practice more ECAT Physics MCQs?

After completing Chapter 1, move to the next chapter on Apna MCQs. We cover all 15 chapters of Physics with chapter-wise MCQs. You can also take full-length ECAT mock tests for timed practice.

Are these MCQs from ECAT past papers?

Our MCQs include questions modeled on ECAT past papers as well as original questions created by subject experts. The questions cover all topics in Measurements that are part of the official ECAT syllabus.

Can I use these MCQs for board exam preparation too?

Absolutely! While these MCQs are organized for ECAT preparation, the content covers the same Physics Chapter 1 (Measurements) topics tested in FSc/Inter board exams. Many students use Apna MCQs for both board and entry test preparation.

Is Apna MCQs free to use?

Yes! Apna MCQs provides free access to chapter-wise MCQs for MDCAT, ECAT, LAT, IBA, Nursing and other entry tests. We believe quality education should be accessible to every student in Pakistan.