Question

The power of a DC motor can be increased by:

• A. increasing the area of the cross section of the coil
• B. increasing the current flowing through the coil
• C. laminating the soft iron core
• D. all of the above

Answer 1

The correct option is D all of the above

The power of the DC motor increases by increasing the torque developed by the shaft/rotor which in turn depends on the current in direct proportion. As the torque on the coil with the increase of cross-sectional area and introducing soft iron core, these are also the factors that effects the power of the motor in direct proportion.