Question 42
Electrical Energy and PowerWhich of the following correctly represents the relationship between the temperature rise θ and the current I in an experiment to illustrate the heating effect of electric current?
- A.A
- B.B
- C.C
- D.D
Show the answer and explanation
Answer: D (D)
Explanation
Heat produced = I²Rt, so the temperature rise is proportional to I². A graph of θ against I² is a straight line through the origin, as in D.