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Standard X
Physics
Electric Motor
Question

State the function of split ring in d.c. motor.
  1. It converges all magnetic lines at the centre of the coil to make a strong magnetic field.
  2. It diverges all the magnetic lines at the centre of the coil to make a strong magnetic field.
  3. It increases speed of the charge particle
  4. It decreases the speed of the particle

A
It converges all magnetic lines at the centre of the coil to make a strong magnetic field.
B
It diverges all the magnetic lines at the centre of the coil to make a strong magnetic field.
C
It increases speed of the charge particle
D
It decreases the speed of the particle
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Solution
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The split ring in the electric motor also known as a commutator reverses the direction of current flowing through the coil after every half rotation of the coil. Due to this the coil continues to rotate in the same direction.

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