When the speed of the DC motor is Increases its Armature current

The speed of a DC motor is directly related to the armature current. Here's a step-by-step explanation:

1. The speed of a DC motor is determined by the voltage across its armature. The higher the voltage, the faster the motor spins.

2. The armature current is the current that flows through the armature (the coil of wire that spins in the magnetic field). This current is what generates the magnetic field that causes the armature to spin.

3. When the speed of the motor increases, the back EMF (Electromotive Force) generated by the motor also increases. This is because the back EMF is proportional to the speed of the motor.

4. The back EMF opposes the supply voltage. As the back EMF increases, the effective voltage across the armature decreases.

5. Since the voltage across the armature is what drives the armature current, a decrease in this voltage means a decrease in the armature current.

6. Therefore, when the speed of the DC motor increases, its armature current decreases.

This is a simplified explanation and actual motor behavior can be influenced by many other factors, including motor design and load conditions.