Physics def
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| What is an electric current? | show 🗑
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| show | The amount of charge that flows in 1 second when the current is 1 Amp
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| State Kirchhoff’s first law | show 🗑
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| show | The energy transferred per unit charge from electrical into other forms
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| Define Electromotive Force | show 🗑
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| show | The potential difference required to carry 1 Amp of current against 1Ω of resistance
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| show | Resistance opposes the current. It is the potential difference per unit current
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| show | The resistance between two points with a potential difference of 1V which has a current of 1A
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| show | The current flowing through a metal is directly proportional to the potential difference across it providing the temperature remains constant
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| Define resistivity, ρ | show 🗑
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| Define power | show 🗑
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| show | A unit of energy. The energy used by a 1kW device in 1 hour
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| show | The sum of the e.m.fs = sum of p.d. around a closed loop of a circuit. Conservation of energy
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| show | The terminal p.d. of a source of emf is the potential difference across its terminals
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| Define displacement | show 🗑
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| Define amplitude | show 🗑
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| show | The periodic time is the time taken to make one complete oscillation/ rotation
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| Define wavelength | show 🗑
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| Define frequency | show 🗑
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| show | The distance travelled by the wave (energy) per unit time
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| show | Where waves cross the total displacement is the vector sum of the individual displacements due to each wave at that point
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| Explain what the term interference means | show 🗑
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| Explain what constructive interference is | show 🗑
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| show | A region where wave trains from coherent sources meet, superposition occurs giving complete cancellation of the waves, through the vector addition of the displacements of the individual waves
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| What is coherence? | show 🗑
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| Define path difference | show 🗑
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| Explain what is meant by phase difference | show 🗑
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| show | On a standing wave, a node occurs where the amplitude/displacement is (always) zero
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| Explain what an antinode is | show 🗑
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| show | Mode of vibration with the lowest possible natural frequency
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| Define a harmonic | show 🗑
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| show | A quantum (set amount) of energy of EM radiation
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| Define an electronvolt | show 🗑
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| show | Minimum amount of energy needed to release an electron from the surface of a metal, symbol: Ф
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| show | Minimum frequency that will cause photoemission from a material, hf=Ф
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| show | The average displacement of charge carriers along the wire per unit time
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Created by:
Georgia11
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