Silver

Copper

Nichrome

Aluminium

Draws cooling air inside

Spreads the heat uniformly

Exhausts the hot air outside

Revolves and reflects the electromagnetic energy

Universal motor

Repulsion motor

Split phase motor

Shaded pole motor

Heat generated = IRT / J cal

Heat generated = I²RT / J cal

Heat generated = IR²T / J cal

Heat generated = (IR)² T / J cal

70.5 Kilo calories

71.0 Kilo calories

71.6 Kilo calories

72.1 Kilo calories