RLC circuits topic check
Check H3 Physics inductance, stored energy and RL, LC and RLC transients, then practise explaining oscillation and damping in circuits.
Learning goals
- Define self-inductance as induced e.m.f. per unit rate of change of current, and use V = L dI/dt
- Describe mutual inductance as a circuit's tendency to oppose a change of current in a nearby circuit
- Explain qualitatively how a dielectric increases capacitance and why a strong enough field causes dielectric breakdown
- Explain qualitatively how a ferromagnetic core increases inductance, non-linearly near saturation
- Apply U = ½LI² to the energy stored in an inductor.
- Derive the expression U = ½LI² for the potential energy stored in an inductor by considering the work done on charges.
- Calculate the combined inductance of inductors in series and in parallel
- Solve RL series circuits with a constant e.m.f. using first-order differential equations
- Solve LC series circuits without an e.m.f. source using second-order differential equations
- Solve problems on RLC series circuits without an e.m.f. source by verifying and using given solutions
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Check what you know
Answer each question and say how sure you are to find what to practise next.
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Check what you know
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About 8 minutes
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About 10 minutes
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Paper instructions
This is for practice only and doesn’t count towards your course progress.
- Question count is checked before you start.
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Your work
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Recent attempts
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Beyond the syllabus: optional enrichment that does not count towards your progress.
Practise after feedback
After a check, practise the skills it showed you need to work on.
About 10 minutes
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Paper instructions
This is for practice only and doesn’t count towards your course progress.
- Question count is checked before you start.
- Feedback appears after you check each answer.
Your work
Without an account, unfinished answers stay in this tab. Signed in, they are saved on this device until the deadline shown when you start.
Getting your questions…
Recent attempts
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No completed attempts are saved yet.
Beyond the syllabus: optional enrichment that does not count towards your progress.
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When you feel ready, answer on your own to show what you can do.
About 10 minutes
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Check again
After practising what your progress check showed, check those skills again.
About 10 minutes
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Your result can count towards your course progress.
- Question count is checked before you start.
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Your work
Without an account, unfinished answers stay in this tab. Signed in, they are saved on this device until the deadline shown when you start.
Getting your questions…
Recent attempts
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No completed attempts are saved yet.
Beyond the syllabus: optional enrichment that does not count towards your progress.
Review
Come back later to see whether your learning has lasted.
About 10 minutes
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Paper instructions
A scheduled review counts towards your course progress only when it is due.
- Question count is checked before you start.
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Your work
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Getting your questions…
Recent attempts
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No completed attempts are saved yet.
Beyond the syllabus: optional enrichment that does not count towards your progress.
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