Question

State the difference between common electric motor and the electric motor used for commercial purpose.​

Answer 1

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The most obvious difference is the type of current eachmotor turns into energy, alternating current in the caseof AC motors, and direct current in the case of DCmotors. AC motors are known for their increased power output and efficiency, while DC motors are prized for their speed control and output range.

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Answer 2

In commercial electric motors, field coils are used for producing magnetic fields and not a permanent magnet as in simple electric motors.

These coils become magnetized when current is passed through them.

Field coils give a stronger, more easily shaped magnetic field than permanent magnets.

More the number of turns in the field coil, more the magnetic field.

Therefore, the suitable field coil sizes are used for various commercial purposes.

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