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Physics · Topic 7

Current electricity

Sub-topic 1 2024 · National Preliminary Free

Resistance of a wire from resistivity, length and cross-sectional area

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Sub-topic 2 2026 · National Preliminary Premium

Resistance of a wire from resistivity, length and cross-sectional area

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Sub-topic 3 2025 · National Preliminary Premium

Resistance of a wire from resistivity, length and cross-sectional area

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Sub-topic 4 2026 · National Quarterfinal Premium

Kirchhoff's current law as a statement of conservation of charge

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Sub-topic 5 2003 · National Semifinal Premium

Current drawn from a resistive heater's power rating and resistance

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Sub-topic 6 2012 · National Preliminary Premium

Ranking common materials by electrical resistivity

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Sub-topic 7 2013 · National Preliminary Premium

Average current from power delivered and voltage of a heater

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Sub-topic 8 2016 · National One-Eighth Premium

Maximum safe voltage across a resistor from its power rating and resistance

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Sub-topic 9 2021 · National Preliminary Premium

Resistance of a resistor from its dissipated power and current, $R = \dfrac{P}{I^2}$

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Sub-topic 10 2023 · National Preliminary Premium

Finding resistance from power and voltage, $R = \dfrac{V^2}{P}$

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Sub-topic 11 2023 · National Preliminary Premium

Pressure is the physical quantity whose si unit is the pascal

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