Conduction of Electricity Through Liquids and Gases: JAMB Physics Questions, Answers & Notes

What Conduction of Electricity Through Liquids and Gases covers in the JAMB Physics syllabus

Electrolysis is the conduction of electricity through an electrolyte (an ion-containing liquid), which decomposes it. Current enters at the anode (+) and leaves at the cathode (−); cations (positive ions) move to the cathode, anions to the anode. Faraday's first law: mass deposited ∝ charge passed (m ∝ Q = It); the Faraday constant (~96500 C) deposits one mole of a monovalent ion. Electroplating deposits a protective/decorative metal coating. Gases conduct only at low pressure and high voltage (neon/fluorescent tubes glow). Heating a metal releases electrons (thermionic emission); streams of these electrons are cathode rays, used in the cathode-ray tube.

For Conduction of Electricity Through Liquids and Gases, JAMB expects you to be able to:

• Explain electrolysis, electrolytes, electrodes and ions
• State Faraday's law of electrolysis and applications like electroplating
• Explain conduction through gases, thermionic emission and cathode rays

Key facts & revision notes: Conduction of Electricity Through Liquids and Gases

These are the recurring points our Conduction of Electricity Through Liquids and Gases questions test — revise them until each feels automatic, then practise the questions above to lock them in.

• Electrolysis is the conduction of electricity through an electrolyte, causing chemical change.
• An electrolyte is a liquid (often a salt/acid solution) that conducts electricity and is decomposed by it.
• The anode is the positive electrode; the cathode is the negative electrode.
• Cations are positive ions (they move to the cathode); anions are negative ions.
• Positive ions (cations) are attracted to the negative electrode, the cathode.
• Electroplating uses electrolysis to deposit a thin metal coating on an object.
• Faraday's first law: mass deposited ∝ charge passed (m ∝ Q = It).
• Gases conduct (glow discharge) at low pressure and high voltage, as in discharge tubes.
• Neon and fluorescent tubes glow because current passes through a low-pressure gas, exciting it.
• Thermionic emission is the emission of electrons from a hot metal surface.
• A cathode-ray tube uses thermionic emission from a heated cathode to produce an electron beam.
• Hydrogen is liberated at the cathode (negative electrode) during electrolysis of acidified water.
• Quantity of electricity (charge) is measured in coulombs (Q = It).
• Electroplating protects against corrosion and improves appearance (e.g.
• Since m ∝ Q = It, a larger current for a longer time deposits more substance.
• Pure water is a poor conductor; it needs dissolved ions (acid/salt) to conduct well.
• Copper ions (cations) are deposited at the cathode during electrolysis of copper sulphate.
• Cathode rays are streams of fast-moving electrons.
• The Faraday constant (about 96500 C/mol) is the charge needed to deposit one mole of a monovalent ion.
• In electrolysis, electrical energy drives a chemical change, so it is stored as chemical energy.
• In liquids, charge is carried by moving ions.
• The cathode is the negative electrode.
• Negatively charged ions are anions.
• Anions are attracted to the positive anode.

Worked examples

Three Conduction of Electricity Through Liquids and Gases questions with the answer and a short explanation, so you can see how the topic is set before you practise the full set.

How Conduction of Electricity Through Liquids and Gases is tested in JAMB Physics

Our Conduction of Electricity Through Liquids and Gases bank holds 40 questions (26 medium, 14 hard). JAMB Physics typically returns to Conduction of Electricity Through Liquids and Gases 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 Conduction of Electricity Through Liquids and Gases 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 Conduction of Electricity Through Liquids and Gases. 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 Conduction of Electricity Through Liquids and Gases is repeated timed practice, so use the button above until the recurring patterns feel automatic.

Common mistakes to avoid in Conduction of Electricity Through Liquids and Gases

The errors that cost marks on Conduction of Electricity Through Liquids and Gases 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 Conduction of Electricity Through Liquids and Gases actively by answering questions, not just by re-reading notes — recall under time is what the exam rewards.

Frequently asked questions

Is Conduction of Electricity Through Liquids and Gases part of the JAMB Physics syllabus?

Yes. Conduction of Electricity Through Liquids and Gases is a recognised topic in the JAMB Physics syllabus, covering explain electrolysis, electrolytes, electrodes and ions. You should be able to recall its key facts and apply them to multiple-choice questions.

How many Conduction of Electricity Through Liquids and Gases questions can I practise on Belmadeng?

There are 40 original, JAMB-standard Conduction of Electricity Through Liquids and Gases 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 Conduction of Electricity Through Liquids and Gases?

Electrolysis is the conduction of electricity through an electrolyte (an ion-containing liquid), which decomposes it. Current enters at the anode (+) and leaves at the cathode (−); cations (positive ions) move to the cathode, anions to the anode. Faraday's first law: mass deposited ∝ charge passed (…

How do I answer Conduction of Electricity Through Liquids and Gases questions quickly in JAMB?

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

Are these JAMB Physics Conduction of Electricity Through Liquids and Gases 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 Conduction of Electricity Through Liquids and Gases questions free without signing up?

Right here — tap “Start Conduction of Electricity Through Liquids and Gases 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.