Waves: JAMB Physics Questions, Answers & Notes

What Waves covers in the JAMB Physics syllabus

A wave transfers energy (not matter). Key terms: frequency f (waves per second, Hz), wavelength λ (distance between corresponding points), amplitude (maximum displacement) and period T = 1/f. They are linked by the wave equation v = fλ. In transverse waves particles vibrate perpendicular to the travel direction (light, water ripples, all electromagnetic waves, which need no medium); in longitudinal waves they vibrate parallel to it (sound), giving compressions (high pressure) and rarefactions. Waves can reflect, refract (change speed/direction between media), diffract (bend around gaps), and interfere; opposing identical waves form standing waves with nodes and antinodes.

For Waves, JAMB expects you to be able to:

• Define wave terms: frequency, wavelength, amplitude, period and speed
• Apply the wave equation v = fλ and T = 1/f
• Distinguish transverse and longitudinal waves and wave behaviours

Key facts & revision notes: Waves

These are the recurring points our Waves questions test — revise them until each feels automatic, then practise the questions above to lock them in.

• A wave transfers energy (not matter) from one point to another.
• Frequency is the number of complete waves (cycles) per second, measured in hertz (Hz).
• Wavelength is the distance between two consecutive corresponding points, e.g.
• Wave speed = frequency × wavelength, v = fλ.
• v = fλ = 50 × 4 = 200 m/s.
• Amplitude is the maximum displacement of a particle from its equilibrium (rest) position.
• The period T is the time for one complete cycle; T = 1/f.
• In a transverse wave, particle vibration is perpendicular to the direction of energy travel (e.g.
• In a longitudinal wave, particles vibrate parallel to the wave's direction (e.g.
• Sound is a longitudinal wave; light, water ripples and radio waves are transverse.
• f = 1/T = 1/0.02 = 50 Hz.
• Compressions are regions where particles are close together, giving high pressure.
• Diffraction is the spreading/bending of waves around edges or through openings.
• Refraction is the change in wave direction due to a change in speed between media.
• Interference is the superposition of two waves, producing reinforcement or cancellation.
• A standing (stationary) wave results from two identical waves moving in opposite directions.
• Nodes are points of zero displacement; antinodes have maximum displacement.
• Electromagnetic waves (like light) are transverse and need no medium, so they cross a vacuum.
• λ = v/f = (3 × 10⁸)/(100 × 10⁶) = (3 × 10⁸)/(1 × 10⁸) = 3 m.
• Frequency is measured in hertz (Hz), where 1 Hz = 1 cycle per second.
• v = fλ = 20 × 5 = 100 m/s.
• λ = v/f, so doubling f halves λ.
• Period is the reciprocal of frequency.
• On a string, particles move perpendicular to the wave — transverse.

Worked examples

Three Waves questions with the answer and a short explanation, so you can see how the topic is set before you practise the full set.

How Waves is tested in JAMB Physics

Our Waves bank holds 40 questions (8 easy, 26 medium, 6 hard). JAMB Physics typically returns to Waves year after year, so steady practice on this topic is high-value revision. Questions are multiple-choice with four options, and at UTME pace you get roughly 40 seconds each — which is why timed practice matters.

How to answer Waves questions

Work the stem first and predict the answer before you look at the options; then eliminate the ones that contradict the key facts above. Watch for “which is not…”, “all of the above” and “except” style stems, which are where rushed candidates lose easy marks on Waves. If a calculation or a precise definition is involved, work it from first principles rather than guessing from a half-remembered rule. When two options look right, re-read the stem for the qualifier that separates them — JAMB rarely repeats an option by accident. If you are still unsure, eliminate the two weakest choices to lift your odds, flag the question, and move on; never burn a full minute on one Physics item when the exam gives you about forty seconds each. Then come back to flagged questions with whatever time remains. The single most reliable way to get faster at Waves is repeated timed practice, so use the button above until the recurring patterns feel automatic.

Common mistakes to avoid in Waves

The errors that cost marks on Waves are usually careless rather than conceptual: misreading a negative stem, confusing two similar terms, or rushing a definition you actually know. Candidates also over-rely on “expo” and last-minute cramming instead of understanding the topic — which fails the moment JAMB rephrases a familiar idea. Treat every option as a claim to be checked against the facts above, keep your working tidy for any calculation, and don’t change a considered answer on a hunch. Above all, revise Waves actively by answering questions, not just by re-reading notes — recall under time is what the exam rewards.

Frequently asked questions

Is Waves part of the JAMB Physics syllabus?

Yes. Waves is a recognised topic in the JAMB Physics syllabus, covering define wave terms: frequency, wavelength, amplitude, period and speed. You should be able to recall its key facts and apply them to multiple-choice questions.

How many Waves questions can I practise on Belmadeng?

There are 40 original, JAMB-standard Waves questions in our free bank, each with the correct answer and a worked explanation. You can practise them untimed or as a timed test.

What are the most important points to know about Waves?

A wave transfers energy (not matter). Key terms: frequency f (waves per second, Hz), wavelength λ (distance between corresponding points), amplitude (maximum displacement) and period T = 1/f. They are linked by the wave equation v = fλ. In transverse waves particles vibrate perpendicular to the trav…

How do I answer Waves questions quickly in JAMB?

Read the stem carefully, eliminate clearly wrong options, and match the remaining choices to the key facts for Waves. Practising timed Waves questions builds the speed you need for UTME's pace of about 40 seconds per question.

Are these JAMB Physics Waves questions past questions or original?

They are original questions written to JAMB (UTME) standard and mapped to the official syllabus — not reproduced past papers. This keeps them legal to use freely while closely mirroring how the real exam tests the topic.

Where can I practise Waves questions free without signing up?

Right here — tap “Start Waves practice” on this page to begin instantly. Belmadeng's CBT practice is completely free and needs no sign-up, download or subscription.

About these questions: original, JAMB-standard items written from the official UTME Physics syllabus (last reviewed 2026-09-18). Belmadeng is an independent study platform and is not affiliated with JAMB. Spotted an error? Use the report link.