AQA A LEVEL PHYSICAL PAPER

AQA a level physics paper qp qp qp qp qp


2
1. Line Study online at
of force: https://quizlet.com/_bnv8
Direction
qp a hypothetical "free north pole" would travel in the fi
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qp qp qp qp qp qp qp qp qp qp
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eld. Otherwise known as a field line.
qp qp qp qp qp qp

2. Motor effect: Effect in which a current in a magnetic field experiences a forc
qp qp qp qp qp qp qp qp qp qp qp qp qp

3. Fleming's left hand rule: Way of working out the directions involved in the mo
qp qp qp qp qp qp qp qp qp qp qp qp qp

tor effect.
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4. Magnetic flux density: Force per unit length per unit current on a condu
qp qp qp qp qp qp qp qp qp qp qp qp

ctor perpendicular to the field lines. Often referred to as the strength of the
qp qp qp qp qp qp qp qp qp qp qp qp qp qp

magnetic field. qp

5. Couple: Pair of forces in opposite directions that try to turn an object. Acts on
qp qp qp qp qp qp qp qp qp qp qp qp qp qp q

the coil of a motor.
qp qp qp qp

6. Thermionic: Property of a material that means that when it gets hot, it e
qp qp qp qp qp qp qp qp qp qp qp qp qp

mits electrons.
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7. Cyclotron: Spiral particle accelerator. qp qp qp

8. Frequency: Number of rotations per second, given by 1/T.
qp qp qp qp qp qp qp qp

9. Mass spectrometer: Device that separates a constituents of a substance by th
qp qp qp qp qp qp qp qp qp qp qp

eir masses.
qp

10. Ion: Charged atom. qp qp

11. Velocity selector: Component that uses an opposing electric and magnetic fi
qp qp qp qp qp qp qp qp qp qp

eld to ensure all particles going straight through have the same speed and dir
qp qp qp qp qp qp qp qp qp qp qp qp qp

ection.
12. Vacuum: Space where (nearly) all particles have been removed (evacuated)
qp qp qp qp qp qp qp qp qp

13. Electromotive force: Force on electrons that tries to push them along. Kno
qp qp qp qp qp qp qp qp qp qp qp

wn as the emf.
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14. Electromagnetic induction: Phenomenon in which a changing magnetic fie qp qp qp qp qp qp qp qp

ld, relative to a wire, will produce an emf.
qp qp qp qp qp qp qp qp

15. Fleming's right hand rule: Also known as the dynamo rule. Works out di
qp qp qp qp qp qp qp qp qp qp qp qp

rec- tions involved in electromagnetic induction.
qp qp qp qp qp

16. Solenoid: Electrical coil. qp qp

17. Lenz's law: "The direction of the induced current is always such as to opp
qp qp qp qp qp qp qp qp qp qp qp qp qp

ose the change that caused the current".
qp qp qp qp qp qp

18. Magnetic flux: Product of the magnetic flux density and the area.
qp qp qp qp qp qp qp qp qp qp

19. Magnetic flux linkage: Product of the magnetic flux and the number of turn
qp qp qp qp qp qp qp qp qp qp qp qp

s of the coil.
qp qp qp

20. Faraday's law: "The induced emf in a circuit is equal to the rate of chan
qp qp qp qp qp qp qp qp qp qp qp qp qp qp

ge of flux linkage through the circuit".
qp qp qp qp qp qp

21. Alternator: Generator of AC. qp qp qp

22. Back emf: An emf generated in a motor that works against the current th
qp qp qp qp qp qp qp qp qp qp qp qp qp

at is powering the motor.
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23. Step-
up: Transformer that raises the voltage and lowers the current (answer is hyph
qp qp qp qp qp qp qp qp qp qp qp qp

1qp/
qp12

, AQA a level physics paper
qp qp qp qp qp


2
enated!)Study online at https://quizlet.com/_bnv8
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2qp/
qp12