Voltage Ambiguity: Alternating Currents HW

[recon]

A question from my HW on Alternating Currents: "When a domestic electric heater is operated from a 240 V a.c. supply, an r.m.s. current of 8.0 A flows. Assuming the heater is purely resistive, calculate its resistance, mean power and maximum instantaneous power. "

I don't know what is meant by "240 V a.c. supply". Is the question referring to the peak voltage or the r.m.s. voltage? Or is there another convention that is generally agreed to? This is all that is holding me back from answering the question.

 

[Curious3141]

240 V is the rms voltage. It's the accepted convention for giving a.c. supply voltages.

 

[kyle8921]

Hello,

Thank you for your question about voltage ambiguity in alternating currents. As a scientist, it is important to clarify and define terms to avoid confusion and ensure accurate calculations.

In this case, it is likely that the question is referring to the r.m.s. voltage of 240 V, as this is the standard measurement for alternating currents. However, it is always best to clarify with your instructor or refer to your course materials for the specific convention being used.

Once the voltage ambiguity is cleared up, you can proceed with calculating the resistance, mean power, and maximum instantaneous power of the electric heater. Remember to use the appropriate formulas and units for your calculations.

I hope this helps and good luck with your assignment!

Best,