Question

please answer this question: the electric power consumed by a device may be calculated by using either of the two expressions, p = I2R or P = V2 / R. the first expressions indicates that it is directly proportional to R whereas the second expressions indicates inverse proportionality. how can the seemingly different dependence of P on R in these expressions be explained ​

Answer 1

Answer:

=> In first expression:-

P= I²R

We know that P=VI.

And By ohm's law (V= IR)

So, P = IR×I

P= I²R --(1)

In second expressions:-

P= V²/R

we know that P=VI.

And By ohm's law (I=V/R)

So, P=V×V/R

P= V²/R

Explanation:

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Answer 2

Answer:

refer to the attachment........