Question

Which of the following is not a formula of electric power a) P=VI b) P= V/R c) P=I²R d)P=W/T​

Answer 1

Answer:

B) P= V/R and C)P= I²/R IS NOT FORMULA OF ELECRIC POWER.

Answer 2

P= V/R is not a formula of electric power. (option b)

• As we know, that power is always equal to voltage consumed times the current applied i.e, P = V/I (where P = power, V = voltage, I = current applied).........(1)
• As per the definition of ohm's law, voltage equals to current applied the resistance produced i.e, V =IR or I = V/R..........(2)
• ∴ By substituting the equation 2 in 1. we get,
• P = V*V/R
• P = $V^{2}$R
• Therefore, the correct formula of power should be P = $V^{2}$R.