It is essential for a relay energized by alternating current to have a. many turns of small wire. b. a laminated core and a shading coil. c. high resistance and light weight. d. double-pole double-throw contacts.

The correct answer is B, a laminated core and a shading coil.

A key difference in an AC relay is the presence of a "shading coil". The purpose of this coil is to keep the relay on when the current drops to zero during phase change (note that in AC power the current and voltage are alternating in a sine wave around 50/60 times per second). The shading coil retains some magnetic energy and essentially holds the relay ON when the current drops to zero momentarily due to the AC waveform.

AC relays also have a laminated core to prevent losses due to eddy current heating.

Company has asked employees for suggestions on ways to personalize the retail customer's shopping experience. they want to supplement traditional appeals to the customer. you have come up with several ideas. select the idea or ideas you have decided to submit.c. designate two of the curtained areas in the women's dressing room for nursing mothers  d. tailor merchandise in each store to the preferences of customers in that geographical region

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