I really like and appreciate the " Electrician's Math and Basic Electrical Formulas" download. It is great, practical, down to earth helpful stuff. Well done with great illustrations.
You may wish to change the available answers to question 12 in the Calculation Challenge Questions.
My calculations indicate a 115 volt, 100 watt lamp will comsume about 400 watts when operated at 230 volts. The highest availble choice (d) is only 150 watts. It will be very bright, but only for a short time! Robert R. Gibby
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