Question

Explain why the current that makes the heater element very hot only slightly warms the connecting wires leading to the heater

Answer 1

The connecting wires of an electric heater are made up of a material having low resistance to allow current to pass through them. Whereas the heater element is made up of special wire having high resistance. Due to this, the power in the element gets dissipiated in the form of heat and the element gets heated.

Answer 2

This happens because the connecting wires are pefectly insulated and offer very low resistance to the flow of current
and thats why the connecting wires gets only slightly heated.
Thank you