barnyard
Active Member
- Joined
- Apr 1, 2025
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- 2025
(question is from north sydney girls high 2020 trial)
can someone write up a model answer for this pretty please bc there isnt one in the marking scheme and ive had a mind blank where the only thing i can think of is adding more armatures and the whole variable resistor thing which is already in the question
also maybe im slow but i thought u cant get rid of back emf so????? like literally what could i even say
q: Explain improvements that can be made to motors to minimise the issues with torque and back emf. (8 marks)
here's the marking scheme too for an 8/8 answer:
Student outlines 4 improvements to the DC motor drawn above and details the Physics principle that governs this improvement and how this principle plays role. Student must include at least 1 improvement that addresses torque and 1 improvement that addresses back emf.
OR
Student describes 3 improvements to the DC motor drawn above and explains the Physics principle that governs this improvement and details how this principle plays role (diagrams). Student must include at least 1 improvement that addresses torque and 1 improvement that addresses back emf.
can someone write up a model answer for this pretty please bc there isnt one in the marking scheme and ive had a mind blank where the only thing i can think of is adding more armatures and the whole variable resistor thing which is already in the question
also maybe im slow but i thought u cant get rid of back emf so????? like literally what could i even say
q: Explain improvements that can be made to motors to minimise the issues with torque and back emf. (8 marks)
here's the marking scheme too for an 8/8 answer:
Student outlines 4 improvements to the DC motor drawn above and details the Physics principle that governs this improvement and how this principle plays role. Student must include at least 1 improvement that addresses torque and 1 improvement that addresses back emf.
OR
Student describes 3 improvements to the DC motor drawn above and explains the Physics principle that governs this improvement and details how this principle plays role (diagrams). Student must include at least 1 improvement that addresses torque and 1 improvement that addresses back emf.
