How to make Ice Cooler || DC motor life hacks || #shorts

Short life span is of

The back emf in a DC motor is maximum when,

Which energy makes an electric motor to work ?

(a) Suppose the windings og the armature in the d.c. motor or Example 4 connot tolerate a current of more than 20 amp. WhaT do you think will happen if the armature gets jammed and cannot rotate when the motor is connected to the supply ? (b) If the supply connection of the d.c. motor in Ex. are removed and the motor is used as a generated by connecting the shaft of its armature to an external mechanical rotor of speed 3000 r.p.m., how much e.m.f. will be generated ?

when the speed of a dc motor increase the armature current

Describe the principle, construction and working of a DC motor with the help of a diagram.