The Electric Motor 3 – Hollms School

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First	First	Last	Quiz Score Total	Question 3a	Image 3a	3a) Use Fleming's Left Hand Rule to determine the direction of forces acting on the left hand side of the coil (light blue) and the right hand side (dark blue)?	Question 3b	Image 3b	3b) Use Fleming's Left Hand Rule to determine the direction of forces acting on the right hand side of the coil (light blue) and the left hand side (dark blue)?	Question 3c	The split-ring commutator ensures that the current always points in the same ............ on either side of the coil.	This means that the force on the left hand side always points ............	and the force on the right hand side always points ............ .	This ensures that the rotation of the coil is always in the ............ direction.	Quiz Percentage Grade
ppefmh	Ed	Garstin	2/6	From question 2, we can see that the coil of wire cannot rotate past 90°. This is because the forces acting on the coil make the coil move back to the 90° position. To solve this problem, we need to switch the direction of the forces when the coil reaches 90°. We can do this by switching the direction of the conventional current using a split-ring commutator.			The coil now rotates to 90° and the current breaks for a fraction of a second. Momentum means that the coil continues moving. The split-ring commutator now causes the direction of the current to switch.			On the top diagram, the light grey side had a force acting upwards and the dark grey side had a force acting downwards. 2c) Complete the sentences below by selecting the correct words from the list?	downwards direction clockwise upwards	downwards direction clockwise upwards	downwards direction clockwise upwards	downwards direction clockwise upwards	33%
First	First	Last	Quiz Score Total	Question 3a	Image 3a	3a) Use Fleming's Left Hand Rule to determine the direction of forces acting on the left hand side of the coil (light blue) and the right hand side (dark blue)?	Question 3b	Image 3b	3b) Use Fleming's Left Hand Rule to determine the direction of forces acting on the right hand side of the coil (light blue) and the left hand side (dark blue)?	Question 3c	The split-ring commutator ensures that the current always points in the same ............ on either side of the coil.	This means that the force on the left hand side always points ............	and the force on the right hand side always points ............ .	This ensures that the rotation of the coil is always in the ............ direction.	Quiz Percentage Grade