1
Q
What is flux linkage
A
the number of turns cutting the flux at one time
2
Q
faraday’s law
A
the induced emf is proportional to the rate of change of magnetic flux linkage
3
Q
lenz’s law
A
the direction of the induced emf is such as to oppose the change that induces it
4
Q
why do charged particles move in a circular orbit in a magnetic field
A
the magnetic force is always perpendicular to the velocity of the particle, so it will end up being forced in a circular orbit. the particles undergo a centripetal acceleration, with the centripetal force being the magnetic force
5
Q
explain why the motion of a magnet on a pendulum is damped
A
- flux changes as it approaches magnet
- emf is induced
- complete circuit therefore current induced
- direction of induced emf oppose the change that induced it
physics
flashcards
Decks in class (27)
# Cards
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1.1 basic physics40
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1.2 kinematics31
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1.3 dynamics8
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1.4 energy concepts10
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1.5 circular motion19
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1.6 Vibrations20
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1.7 kinetic theory10
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1.8 thermal physics13
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2.1 conduction of electricity5
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2.2 resistance11
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2.3 dc circuits11
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2.4 capacitance9
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2.5 solids under stress34
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2.6 Electrostatic And Gravitational Fields12
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2.7 using radiation to investigate stars22
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2.2.8 Orbits and the Wider Universe22
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3.1 nature of waves10
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3.2 wave properties14
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3.3 refraction of light10
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3.4 photons13
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3.5 lasers10
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3.6 nuclear decay9
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3.7 particles and nuclear structure18
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3.8 nuclear energy7
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3.9 magnetic fields12
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3.10 electromagnetic induction5
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formulae that has to be learnt16
