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Today’s lesson The MOTOR EFFECT Can you gather around Mr Porter? The Motor Effect When a current is placed in a magnetic field it will experience a force (provided the current is not parallel to the field). This is called the motor effect. Can you copy this sentence into your books please. The Motor Effect The direction of the force on a current in a magnetic field is given by Flemming’s left hand rule. Thumb = Motion First finger = Field direction (N to S) Centre finger = Conventional Current (+ to -) The Motor Effect Can you copy this please? WITH DIAGRAM! The direction of the force on a current in a magnetic field is given by Flemming’s left hand rule. Thumb = Motion First finger = Field direction (N to S) Centre finger = Conventional Current (+ to -) Sample question 1 In this example, which way will the wire be pushed? (red is north on the magnets) Sample question 2 In this example, which way will the wire be pushed? (red is north on the magnets) Current Field Sample question 3 Can you gather around Mr Porter? Again?! Building an electric motor Can you gather around Mr Porter at the back of the class? Again?! Building a loudspeaker These also use the motor effect Coil in here magnet Let’s read! Read pages 210 and 211. Then answer the questions on p211. Finish for homework