The newest 10 of 10 written questions. Open one to see it on the real paper.
Describe how the split-ring commutator and brushes ensure the coil rotates continuously in the same direction.
See it on the paper →Describe the function of the split‑ring commutator in a simple d.c. motor.
See it on the paper →The following statements explain what causes the coil in Fig. 9.3 to rotate. The statements are in the wrong order. A B C D E A current flows through the coil. The coil experiences a force and starts to spin. The power supply applies a potential difference across the coil. This causes a magnetic field to be induced aro...
See it on the paper →On Fig 9.3, label the split-ring commutator with a cross (X).
See it on the paper →Describe how the split-ring commutator allows the coil to keep on turning.
See it on the paper →On Fig. 9.4, draw a double headed arrow ( the generator to complete one full rotation. ) to show the time taken for the coil in
See it on the paper →The electric car has a powerful d.c. motor. The turning effect of the motor can be increased by increasing the number of turns on the coil in the motor. State one other way to increase the turning effect of the d.c. motor.
See it on the paper →Fig. 9.2 shows a simple d.c. electric motor. N S Fig. 9.2 On Fig. 9.2, label the split-ring commutator with the letter X and the coil with the letter C.
See it on the paper →State the name of the component labelled Q on Fig. 12.3. name of component Q
See it on the paper →Explain why the coil moves when an electric current passes through it.
See it on the paper →This question was more successfully answered with candidates often referring to a reversing of the current every half turn.
— Examiner report, February/March 2025, 0654/42 Q10(a)(iii) (Cambridge)
The processes occurring in the electric motor were often placed in the correct order.
— Examiner report, May/June 2021, 0654/43 Q9(c)(i) (Cambridge)
The majority of candidates could label the split-ring commutator.
— Examiner report, May/June 2021, 0654/43 Q9(c)(ii) (Cambridge)
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