Waec Model Questions Vol1 2017 Physics Question 1

Practice practical question 1 from the 2017 Waec Model Questions Vol1 Physics examination. This question covers Measurements and Units .

Waec Model Questions Vol1 2017 Physics Practical

Topic: Measurements and Units

Question 1 WAEC_MODEL_QUESTIONS_VOL1 • 2017 • PHYSICS • practical

A metal rod is supplied with a certified length of 150.0 mm. The student measures the rod using (i) a metre rule (least count 1 mm) and (ii) a vernier caliper (least count 0.02 mm). The recorded readings are: Metre rule (mm): 150, 151, 149 Vernier caliper (mm): 149.96, 150.02, 149.98 Using these data, the student is required to determine the accuracy of each instrument and comment on possible sources of error.

Question Parts

( a )

Calculate the average length obtained with the metre rule.

( b )

Calculate the absolute error and the percentage error of the metre‑rule measurement relative to the certified length.

( c )

Calculate the average length obtained with the vernier caliper, then determine its absolute and percentage errors.

( d )

State two possible sources of error in the measurements and suggest one method to minimise each.

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About This Question

This is Waec Model Questions Vol1 2017 Physics Question 1. It is a practical question from the 2017 Waec Model Questions Vol1 Physics examination.

The question covers Measurements and Units .

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