Waec Model Questions Vol1 2022 Physics Question 1

Practice practical question 1 from the 2022 Waec Model Questions Vol1 Physics examination. This question covers Measurements and Units .

Waec Model Questions Vol1 2022 Physics Practical

Topic: Measurements and Units

Question 1 WAEC_MODEL_QUESTIONS_VOL1 • 2022 • PHYSICS • practical

A metal rod of nominal length 150.00 mm is to be measured using a vernier caliper (least‑count = 0.02 mm). The true length of the rod has been determined independently with a micrometer and recorded as 150.00 mm. The student records three successive readings with the vernier caliper as follows: 149.96 mm, 150.02 mm and 149.98 mm.

Question Parts

( a )

Calculate the average of the three vernier‑caliper readings.

( b )

Determine the percent error of the average reading with respect to the true length of the rod.

( c )

Using the least‑count of the vernier caliper, calculate the expanded uncertainty (k = 2) of the measurement and express the final result in the form: average ± uncertainty (mm).

( d )

Identify two plausible sources of error that could affect the vernier‑caliper readings and suggest one practical way to minimise each error.

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About This Question

This is Waec Model Questions Vol1 2022 Physics Question 1. It is a practical question from the 2022 Waec Model Questions Vol1 Physics examination.

The question covers Measurements and Units .

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