Power Dissipation
Easyphysics
Power dissipated in resistor is:
Select the correct option:
Solution
Incorrect! Answer:
P=I2R
The power (P) dissipated as heat in a resistor follows Joule's law of heating: P=V⋅I Substituting V=IR (Ohm's Law): P=(IR)⋅I=I2R Substituting I=V/R: P=V⋅(V/R)=RV2.
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About This Question
- Subject
- physics
- Chapter
- current electricity
- Topic
- power dissipation
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
P=I2R
The power (P) dissipated as heat in a resistor follows Joule's law of heating: P=V⋅I Substituting V=IR (Ohm's Law): P=(IR)⋅I=I2R Substituting I=V/R: P=V⋅(V/R)=RV2.
This easy difficulty physics question is from the chapter current electricity, covering the topic of power dissipation. It appeared in the 2025 exam.
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