1. Draw in the field lines
When an ____________ current flows through a _______ of wire it creates a magnetic _______. The diagram below shows its shape . x
Current flowing up a wire
Current flowing down a wire

2. P6 – Electricity for Gadgets
Lesson 10 – Electric motors
Learning aim: Demonstrate an understanding of how an electric motor works

3. Success Criteria Learning Objectives
Recognise uses of electric motors and the energy changes involved.
Understand how a motor causes movement
Describe the effects of changing the current, field or number of turns in the coil.
Understand how a commutator works.
Recognise how practical motors are adapted.
Recall where motors are found and how they transfer energy.
(Grade E-D)
Explain how forces on a current carrying coil in a magnetic field are used in a simple d.c. electric motor. (Grade C)
Describe the effect of changing:
the size of the electric current
the number of turns on the coil
the strength of the magnetic field. (Grade C)
Explain how the direction of force in a motor is maintained by using a split-ring commutator. (Grade C-A)
Explain why practical motors have a radial field produced by curved pole pieces. (Grade C-A)

4. M Faraday?
In 3 sentences MHW3

5. Read Motors at home pg 250
Answer Q5 on white boards

6. Current-carrying wire in a magnetic field review
F = Force
B = Magnetic field
I = Current S
10/11/2018

7. Motor (p6e02) – now build your own motor
Complete the tasks and answer the questions

8. Motor – worksheet P6C4
Look at the diagram of a motor. (P6c4) Label and describe the purpose of each of the key parts
Permanent magnet
Coil
Brush
Split ring commutator

9. What effects the size of the force?
Can you name the three things that effect the size of the force on the coil in a motor :
The strength of the magnetic field
The current in the wire
The length of the wire (in the field)

10. Plenary
Use 5 words to:
Explain how forces on a current carrying coil in a magnetic field are used in a simple d.c. electric motor.
Write these on a white board
Share them with someone in the class you have not worked with today

11. Success Criteria Learning Objectives
Recognise uses of electric motors and the energy changes involved.
Understand how a motor causes movement
Describe the effects of changing the current, field or number of turns in the coil.
Understand how a commutator works.
Recognise how practical motors are adapted.
Recall where motors are found and how they transfer energy.
(Grade E-D)
Explain how forces on a current carrying coil in a magnetic field are used in a simple d.c. electric motor. (Grade C)
Describe the effect of changing:
the size of the electric current
the number of turns on the coil
the strength of the magnetic field. (Grade C)
Explain how the direction of force in a motor is maintained by using a split-ring commutator. (Grade C-A)
Explain why practical motors have a radial field produced by curved pole pieces. (Grade C-A)