Cambridge IGCSE Physics4.5 Electromagnetic effects Worksheet
17 questions · 49 marks · Word
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What objectives does this worksheet meet?
Core
- I know that an e.m.f. can be induced in a conductor when the conductor moves across a magnetic field, or when a changing magnetic field links with the conductor.
- I can describe an experiment that demonstrates electromagnetic induction.
- I can state the factors that affect the magnitude of an induced e.m.f.
- I can describe the pattern and direction of the magnetic field caused by currents in straight wires and in solenoids.
- I can describe an experiment that shows a force acting on a current-carrying conductor in a magnetic field, including the effect of reversing:a)the currentb)the direction of the field
- I know that a current-carrying coil in a magnetic field may experience a turning effect, and that the turning effect is increased by increasing:a)the number of turns on the coilb)the currentc)the strength of the magnetic field
- I can use the terms primary, secondary, step-up and step-down.
- I can recall and use the equation Vp/Np = Vs/Ns, where p and s refer to the primary and the secondary.
- I can state the advantages of high-voltage transmission.
Extended
- I can recall and use the relative directions of force, magnetic field and current.
- I can describe how an electric motor works, including the action of a split-ring commutator and brushes.
- I can explain the principle of how a simple iron-cored transformer works.