Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion
Discussion Forum : Electronic Devices and Circuits - Section 5 (Q.No. 31)
31.
The maximum power handling capacity of a resistor depends on
Discussion:
3 comments Page 1 of 1.
Abhishek said:
1 decade ago
Is it not depend on surface area?
Sephirim said:
6 years ago
In my opinion, the surface area should be the greater it's the surface area the more power it can dissipate safely.
Pradeep Gupta said:
3 months ago
The maximum power a resistor can handle before it burns out or degrades is directly related to:
How much heat it can absorb and dissipate safely = Thermal Capacity.
This depends on:
Material's thermal properties.
Physical size (more mass = better heat absorption).
Ability to transfer heat to the environment.
Why Not Others?
Option : Reason It's Wrong
(a) Total surface area : Helps in cooling, but not main deciding factor.
(b) Resistance value : Affects how much power is dissipated, not how much it can handle.
(d) Resistivity : Only affects resistance value, not thermal endurance.
How much heat it can absorb and dissipate safely = Thermal Capacity.
This depends on:
Material's thermal properties.
Physical size (more mass = better heat absorption).
Ability to transfer heat to the environment.
Why Not Others?
Option : Reason It's Wrong
(a) Total surface area : Helps in cooling, but not main deciding factor.
(b) Resistance value : Affects how much power is dissipated, not how much it can handle.
(d) Resistivity : Only affects resistance value, not thermal endurance.
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