everyday science MCQ #49424

Electric power dissipated in a resistor can be calculated using which formula?

everyday science MCQ #49424

  1. Question 1

    Q1. Electric power dissipated in a resistor can be calculated using which formula?

    • A) P = V/I
    • B) P = I²R
    • C) P = IR²
    • D) P = V²/I

    Answer: P = I²R

    Explanation: Electric power dissipated in a resistor can be written as P = I²R (derived from P = IV and V = IR); this shows power increases with the square of current, which is why resistance heating is used in appliances.