Curriculum
Course: IB Physics HL
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Curriculum

IB Physics HL

Theme A — Space, Time and Motion

0/125 Dr Dabour Hub Science Diagram and Course Material

Theme B — The Particulate Nature of Matter

0/105 Dr Dabour Hub Science Diagram and Course Material

Theme C — Wave Behaviour

0/73 Dr Dabour Hub Science Diagram and Course Material

Theme D — Fields

0/77 Dr Dabour Hub Science Diagram and Course Material

Theme E — Nuclear and Quantum Physics

0/89 Dr Dabour Hub Science Diagram and Course Material

Tools and Inquiry — IB Physics skills

0/43 Dr Dabour Hub Science Diagram and Course Material
Quiz

D.4.5 AC Generators – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
The emf of a rotating coil generator is a maximum when the coil's plane is
parallel to the field
perpendicular to the field
at 45° to the field
never
2.
The peak emf of an AC generator is proportional to
the square root of frequency
the rotation frequency
the period
1/frequency
3.
A 12 V r.m.s. supply has a peak voltage of about
8.5 V
12 V
17 V
24 V
4.
The r.m.s. current is 3.0 A in a resistor of 10 Ω. The mean power is
30 W
45 W
90 W
180 W
5.
The rotation frequency of a coil is halved. The peak emf and period change as follows
peak halves, period doubles
peak doubles, period halves
peak halves, period halves
peak is unchanged, period doubles
6.
Slip rings are used in an AC generator to
reverse current every half turn
increase the emf
reduce eddy currents
connect the rotating coil to the circuit continuously
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Part of Theme D — Fields — see every lesson and quiz in this unit.
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