P6c Motors
- Specification
- Lesson Plans
- Questions
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Describe that a current carrying wire has a circular magnetic field around it.
Describe and recognise that this field is made up of concentric circles.
Recognise and describe that a current carrying straight wire placed in a magnetic field can move.
State that motors are found in a variety of everyday applications e.g. washing machine, CD player, food processor, electric drill, electric lawnmower, windscreen wiper.
Describe the shape of the magnetic field around a straight wire, rectangular coil, or solenoid.
Describe that a current carrying wire at right angles to a magnetic field experiences a force.
Describe the effect of reversing the current and/or the direction of the magnetic field.
Explain how the forces on a current carrying coil in a magnetic field produce a turning effect on the coil.
Explain how this effect is used in a simple DC motor.
Describe the effect of changing:
- the size of the electric current;
- the number of turns on the coil;
- the strength of the magnetic field.
Describe how Fleming’s Left Hand Rule is used to predict the direction of the force on a current carrying wire.
Explain how the direction of the force on the coil in a DC electric motor is maintained in terms of the change of current direction every half-turn.
Describe how this is achieved using a split-ring commutator in a simple DC electric motor.
Explain why practical motors have a radial field produced by curved pole pieces.
Objectives:
stuff what is important goes hereContent 3Content 4Content 5Content 2
Prior Learning:
Difficult Concepts:
Outline:
Suggested Practicals:
Extension Activities:
Homework:
Homework1
Objectives:
Content 1
Prior Learning:
Difficult Concepts:
Outline:
Suggested Practicals:
Extension Activities:
Homework:
Homework2 again