State the function of split ring· in d.c. motor.

Explanation

### Step-by-Step Solution:

1. **Understanding the DC Motor**: A DC motor converts electrical energy into mechanical energy. It consists of a coil, a magnetic field, and a split ring (commutator).

2. **Role of the Split Ring**: The split ring in a DC motor is essential for the operation of the motor. It acts as a commutator that reverses the direction of current in the coil.

3. **Current Flow and Magnetic Field**: When current flows through the coil, it generates a magnetic field. The interaction between the magnetic field and the current in the coil produces a force that causes the coil to rotate.

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