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Check what I know: Electromagnetism · G3 Physics and O-Level Physics

Check what you know about Electromagnetism, practise what needs work, then check your progress and return for a later review.

SEC G3 Physics 2027

Learning goals

Work through the questions and use the feedback to plan revision.

Check what I know

Check what I know: Electromagnetism · G3 Physics and O-Level Physics

A text-first Electromagnetism assessment with explicit current, field, force, beam, coil and commutator descriptions.

About 8 minutes

Check what I know

Answer 6 short questions. This starting check helps choose what to work on; it does not prove mastery.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

This check needs JavaScript to record answers. The reviewed questions are listed below for study.

Which statement correctly gives the field patterns for a straight current-carrying wire and a long current-carrying solenoid?

Both have radial straight lines.
A wire has a bar-magnet field; a solenoid has circles only.
A straight wire has concentric circles; a solenoid is strongest at the middle of its outside surface.
A straight wire has concentric circles; a solenoid has a bar-magnet-like field with a strong, nearly uniform field inside, away from the ends.

In Fleming's left-hand rule, which digit gives force?

First finger.
Second finger.
Little finger.
Thumb.

Why are electromagnets useful in devices such as circuit breakers?

They eliminate current during normal operation.
Their strength cannot change with current.
Their magnetic effect can be switched and varied with current, allowing a current-dependent mechanical action.
They remain permanently magnetised without current.

Which comparison correctly relates magnetic force on a wire and on a charged-particle beam?

Both arise from moving charge in a magnetic field; conventional current follows positive-charge motion, while an electron beam moves opposite to conventional current.
Only a wire can experience magnetic force.
Electron motion is always conventional-current direction.
Stationary charge experiences the same motor force.

A motor coil has a nonzero turning effect in an external magnetic field. Keep the coil area and orientation fixed; hold other quantities constant when changing one quantity. Why does a coil turn, and how can the effect be increased?

A single force through the axis creates the couple.
More turns have no effect on turning.
Opposite forces form a couple; increasing current or the number of turns increases the turning effect.
Forces cancel; reducing current increases turning.

What does a split-ring commutator do, and what is the soft-iron cylinder's effect?

The commutator stops current every full turn permanently.
The commutator reverses coil current every half-turn to maintain rotation; soft iron strengthens and shapes the field.
The commutator strengthens the field; iron reverses current.
Both supply electrical energy.

Practise

Practise: Electromagnetism · G3 Physics and O-Level Physics

A text-first Electromagnetism assessment with explicit current, field, force, beam, coil and commutator descriptions.

About 10 minutes

Practise

Questions are selected when you start. Use the feedback to decide what to practise next; this does not prove mastery.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Practise

Practise after feedback: Electromagnetism · G3 Physics and O-Level Physics

A text-first Electromagnetism assessment with explicit current, field, force, beam, coil and commutator descriptions.

About 10 minutes

Practise

Questions are selected when you start. Use the feedback to decide what to practise next; this does not prove mastery.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Check my progress

Check my progress: Electromagnetism · G3 Physics and O-Level Physics

A text-first Electromagnetism assessment with explicit current, field, force, beam, coil and commutator descriptions.

About 10 minutes

Check my progress

Answer 8 questions. If accepted, this result can contribute to your course progress.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Check again

Check again: Electromagnetism · G3 Physics and O-Level Physics

A text-first Electromagnetism assessment with explicit current, field, force, beam, coil and commutator descriptions.

About 10 minutes

Check again

Answer 8 questions. If accepted, this result can contribute to your course progress.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Review

Review: Electromagnetism · G3 Physics and O-Level Physics

A text-first Electromagnetism assessment with explicit current, field, force, beam, coil and commutator descriptions.

About 10 minutes

Review

Answer 8 questions. A scheduled review can contribute to your course progress only when it is due and the result is accepted.

Recent attempts

History is stored only in this browser.

No completed attempts are saved yet.

Course and syllabus information

Course: SEC G3 Physics
Edition: SEC G3 Physics 2027

Check what I know: Electromagnetism · G3 Physics and O-Level Physics

Check what I know: Electromagnetism · G3 Physics and O-Level Physics

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Practise: Electromagnetism · G3 Physics and O-Level Physics

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Practise after feedback: Electromagnetism · G3 Physics and O-Level Physics

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Check my progress: Electromagnetism · G3 Physics and O-Level Physics

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Check again: Electromagnetism · G3 Physics and O-Level Physics

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Review: Electromagnetism · G3 Physics and O-Level Physics

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