- #1
Janiceleong26
- 276
- 4
1. Homework Statement
P=IV,
=I2R
=V2/R
For zero resistance, I used P=V2/R formula, and sub. R=0 , power would be infinite. But if I sub. Into P=I2R, power will be zero. The correct answer should be zero. But why do we need to use the second relevant equation I typed above?
For infinite resistance, I used P=V2/R and so will result in power tending to zero.
I am confused on when to we use which equations to calculate power
Homework Equations
P=IV,
=I2R
=V2/R
The Attempt at a Solution
For zero resistance, I used P=V2/R formula, and sub. R=0 , power would be infinite. But if I sub. Into P=I2R, power will be zero. The correct answer should be zero. But why do we need to use the second relevant equation I typed above?
For infinite resistance, I used P=V2/R and so will result in power tending to zero.
I am confused on when to we use which equations to calculate power