everyday science MCQ #49637

Joule's law of heating states that heat produced is proportional to:

everyday science MCQ #49637

  1. Question 1

    Q1. Joule's law of heating states that heat produced is proportional to:

    • A) I²Rt
    • B) resistance only
    • C) current only
    • D) voltage only

    Answer: I²Rt

    Explanation: Joule's law of heating states that the heat Q produced in a conductor is proportional to the square of the current (I²), the resistance (R), and the time (t), expressed as Q = I²Rt. This relationship shows that doubling the current quadruples the heat generated, which is why high-resistance, high-current circuits generate significant waste heat.