science

Statampere

Statampere is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Statampere rather than just read about it. In short: The statampere (statA) is the derived electromagnetic unit of electric current in the CGS-ESU (electrostatic cgs) and Gaussian systems of units.:278 One statampere corresponds to 10/ccgs ampere ≈ 3.33564×10−10 ampere in the SI system of units. The name statampere is a shortening of abstatampere, where the idea was that the prefix abstat should stand for absolute electrostatic and mean ‘belonging to the CGS-ESU (elec…

Key takeaways

Statampere belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Statampere to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Statampere from memory before moving on to harder problems.

Reference excerpt

The statampere (statA) is the derived electromagnetic unit of electric current in the CGS-ESU (electrostatic cgs) and Gaussian systems of units.:278 One statampere corresponds to 10/ccgs ampere ≈ 3.33564×10−10 ampere in the SI system of units. The name statampere is a shortening of abstatampere, where the idea was that the prefix abstat should stand for absolute electrostatic and mean ‘belonging to the CGS-ESU (electrostatic cgs) absolute system of units’. The esu-cgs (or "electrostatic cgs") units are one of several systems of electromagnetic units within the centimetre–gram–second system of units; others include CGS-EMU (or "electromagnetic cgs units"), Gaussian units, and Heaviside–Lorentz units. In the cgs-emu system, the unit of electric current is the abampere. The unit of current in the Heaviside–Lorentz system is unnamed. The other units in the cgs-esu and Gaussian systems related to the statampere are:

statcoulomb – the charge that passes in one second through any cross-section of a conductor carrying a steady current of one statampere statvolt – the electrostatic potential difference such that moving a charge of one statcoulomb through it at constant speed requires one erg of work to be done. statohm – the resistance of a conductor that, with a constant current of one statampere through it, maintains between its terminals a potential difference of one statvolt

Notes

References

Worked examples

Example 1 — a first encounter with Statampere

Start with the simplest possible case. Write down what Statampere claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Statampere before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Statampere ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Statampere

In research: Statampere appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Statampere in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Statampere is common in secondary-school and first-year university syllabi. It links to neighbouring topics Centimetre–gram–second system of units, Units of electric current, so understanding it makes those chapters shorter.
In everyday life: Look for Statampere outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Statampere in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Statampere means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Statampere out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Statampere in simple terms?

Why does Statampere matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Statampere?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Statampere.