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AQA a level physics paper 2- Questions and Answers 100% Pass
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AQA a level physics paper 2- Questions and Answers100% Pass
Electromotive force Correct Ans-Force on electrons that tries to push them along. Known
as the emf.
Electromagnetic induction Correct Ans-Phenomenon in which a changing magnetic field,
relative to a wire, will produce an emf.
Fleming's right hand rule Correct Ans-Also known as the dynamo rule. Works out
directions involved in electromagnetic induction.
Solenoid Correct Ans-Electrical coil.
Lenz's law Correct Ans-"The direction of the induced current is always such as to oppose
the change that caused the current".
, AQA a level physics paper 2- Questions and Answers
100% Pass
Magnetic flux Correct Ans-Product of the magnetic flux density and the area.
Magnetic flux linkage Correct Ans-Product of the magnetic flux and the number of turns of
the coil.
Faraday's law Correct Ans-"The induced emf in a circuit is equal to the rate of change of
flux linkage through the circuit".
Alternator Correct Ans-Generator of AC.
Back emf Correct Ans-An emf generated in a motor that works against the current that is
powering the motor.
Step-up Correct Ans-Transformer that raises the voltage and lowers the current (answer is
hyphenated!)
, AQA a level physics paper 2- Questions and Answers
100% Pass
Line of force Correct Ans-Direction a hypothetical "free north pole" would travel in the
field. Otherwise known as a field line.
Motor effect Correct Ans-Effect in which a current in a magnetic field experiences a force.
Fleming's left hand rule Correct Ans-Way of working out the directions involved in the
motor effect.
Magnetic flux density Correct Ans-Force per unit length per unit current on a conductor
perpendicular to the field lines. Often referred to as the strength of the magnetic field.
Couple Correct Ans-Pair of forces in opposite directions that try to turn an object. Acts on
the coil of a motor.
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