Re: ElectricityReciever
Sometimes simplifications are good, even if they aren't 100% accurate.  If we wanted to avoid all misconceptions from the start, we could insist that everyone learn about electricity by studying Maxwell's equations (after about 20 years of math classes).
 
 If the author introduces the term "electric reciever" in order to repeat it within the text ( in order to avoid a longer phrase), then I think it is OK.  Using "electric reciever" is better than always repeating "devices that use electrical energy to for  heat, sound, lighting, motion, or other purposes like motors,lights, televisions....."
 
 If the author introduces it as a vocabulary term such that your daughter comes home and says "Mom, tell Jimmy to turn off the electric receiver so I can concentrate on my homework!", then that's a whole different story.
 
 Steve