IB Physics SL S1.1 Experimental techniques Questions

SLSL HLHL

Practise IB Physics SL S1.1 by planning measurements, choosing instruments, recording uncertainty and interpreting experimental evidence.

9 questions in this syllabus scope, with question parts counted together.

Exam points & syllabus

Exam points

Identify a needed measurement for the given experiment and avoid adding an incorrect alternative when only one answer is requested.
Apply zero correction by subtracting the measured offset with its sign, rather than treating a negative zero error as positive.
Explain alignment and reference placement when using a ruler, then use subtraction of consistent lengths for an inaccessible distance.
Choose instruments by both scale resolution and measuring span, giving enough detail to show that the selected instrument fits the task.
Describe an actual volume-reading action, such as eye-level meniscus reading or keeping the measuring cylinder vertical.
Interpret a protractor using the correct angular reference: optical incidence and refraction angles are measured from the normal.
Relate the maximum exposure or flash time to speed and allowed position blur, giving both a physical reason and a suitable value.

Covered syllabus points

S1.1.1—Safety and ethics S1.1.2—Measurement variables

[Maximum number: 2]

This question is about mobile phones.

The number of mobile phones has grown rapidly in recent years. Discuss environmental issues associated with this rapid increase.

Exam points

Choose a relevant missing measurement for the stated experiment; when only one is requested, an additional incorrect suggestion can lose the mark.
Correct a scale reading by subtracting its zero reading, retaining the sign of a negative offset.
Describe concrete ruler placement: align it with the measured length, keep it close and allow for the zero reference when needed.
Determine an inaccessible length by subtracting the accessible measured length from the full length, using the correct reference points.
Choose an instrument with sufficient span as well as suitable graduations; a wire about 462 mm long needs a ruler at least 50 cm long.
Choose a micrometer, screw gauge or suitable caliper for the supplied small wire diameter rather than relying on a coarse length scale.
For liquid volume, give an action such as reading the bottom meniscus at eye level or keeping the cylinder upright on a level surface.
Read the refraction angle from the normal, checking the correct protractor scale rather than reporting the angle to the surface.
Limit motion blur by making flash duration no greater than the allowed position uncertainty divided by the relevant object speed.

[Maximum number: 1]

The density of a metal sphere is determined using a digital caliper and a mass balance.

The digital caliper is used to measure the diameter D of the sphere by placing the sphere in the jaws of the digital caliper. This reading is shown.

The sphere is then removed and another reading is taken immediately afterwards with the jaws closed.

Calculate D.

Question 1

Question 1