Repeat Problem 1 using single resistor values from Appendix H. Calculate the resulting low...

Repeat Problem 1 using single resistor values from Appendix H. Calculate the resulting low, medium, and high power ratings.

Problem 1.

You have been given the job of redesigning the hair dryer described in Problem 2 for use in England. The standard supply voltage in England is 220 V (rms). What resistor values will you use in your design to meet the same power specifications?

Problem 2.

The hair dryer in the Practical Perspective uses a 60 Hz sinusoidal voltage of 120 V (rms). The heater element must dissipate 250 W at the low setting, 500 W at the medium setting, and 1000 W at the high setting.

a) Find the value for resistor R2 using the specification for the medium setting, using Figure.

Figure.

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b) Find the value for resistor R1, using the spccification for the low setting, using the results from part (a) and Figure.

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c) Is the specification for the high setting satisfied?