alamin
Jan18-06, 02:56 AM
The magnetic field in the electric motor of a toy train is provided by a permanent magnet. The motor works from a 12 V DC supply and its armature has a resistance of 5.0 ohms. Running a light load on a level track, it reaches a speed of 0.45 m/s and takes 0.6 A. When a carriage is hitched up to the engine the maximum speed reached is 0.3 m/s.
a. What current does the motor take?
b. What maximum current would the motor take if started from rest?
a. What current does the motor take?
b. What maximum current would the motor take if started from rest?