Why do the wires connecting an electric heate | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) The wires of the connecting cord of an electric heater are typically made of copper $(Cu)$,which has extremely low electrical resistance. Accordin

Vedclass · Accepted Answer

The heating element has high resistance,while the connecting wires have negligible resistance.

Vedclass · Answer

(C) The wires of the connecting cord of an electric heater are typically made of copper $(Cu)$,which has extremely low electrical resistance. According to Joule's law of heating,$H = I^2Rt$,the heat produced is directly proportional to the resistance $(R)$. Since the resistance of copper wires is negligible,very little heat is produced,and they do not glow.Conversely,the heating element is made of an alloy like nichrome,which has a very high electrical resistance. Due to this high resistance,a large amount of heat is generated when current flows through it,causing it to glow red-hot.

Why do the wires connecting an electric heater to the mains not glow while its heating element does?

Similar Questions

$A$ wire of resistance $5 \, \Omega$ is bent in the form of a closed circle. What is the resistance between two points at the ends of any diameter of the circle?

How will you infer with the help of an experiment that the same current flows through every part of the circuit containing three resistances in series connected to a battery?

If the charge on an electron is $1.6 \times 10^{-19} \text{ C}$,find the approximate number of electrons in $1 \text{ C}$.

What is potential difference? Is it a scalar quantity or a vector quantity? Give its $SI$ units.

Vedclass Test Series

Exam Paper Generator

Online Exam Module