Question
Download Solution PDFWhich method of electrical heating involves passing electrical energy through a heating element to generate heat, which is then transferred to the substance to be heated?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option (4) i.e, Resistance heating
Explanation:
- Resistance heating relies on the principle of Joule heating, where the passage of electric current through a conductor with high resistance (the heating element) generates heat.
- This heat is then transferred to the surrounding material.
- Induction heating uses a changing magnetic field to induce eddy currents in the material itself, directly generating heat within the object.
- No separate heating element is used.
- Direct arc heating utilizes an electric arc to directly generate heat between electrodes.
- While it can be used for heating objects, the arc itself acts as the heating element, not transferring heat from a separate element.
- Power frequency heating is not a recognized term in common methods of electrical heating.
- Therefore, only resistance heating directly fits the description of transferring heat from a dedicated heating element to the substance being heated.
Last updated on May 29, 2025
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