6.14

6.14

01 December 2011

18:05

·         

6.14 recall that the force on a current-carrying conductor in a magnetic field increases with the strength of the field and with the current

<<dc motor - factors affecting the speed of a motor interactive.swf>>

Exam style question

·         What changes can you make to a simple dc motor to increase the force it can exert? (3 marks)

Model Answer

·         Increase the strength of the magnetic field

·         Increase the current in the coil

·         Increase the number of turns on the coil

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