The voltage in the power lines running in the lane behind your house or apartmen
ID: 3899527 • Letter: T
Question
The voltage in the power lines running in the lane behind your house or apartment will typically be at a potential of something like 7200 volts. The standard household potential is 120 volts. Most of you, if you look at the power lines outside behind your living quarters, will notice a transformer box located near the top of one of the poles. Below, you will see a photo of the one behind my house.
Which of the following would be an acceptable ratio of the number of primary vs, secondary loops in the transformer (Np:Ns)?
Explanation / Answer
option a) will be correct because generally transformers used for electricity supply to colonies or at reception centres are STEP DOWN transformers...further the ratio of such transformers should not be too high....a suitable ratio is in the range 10-20 ....so only option a is the best suited...more precisely....N1/N2 = V1/V2 =3600/60 = 6 so option suits to the question much better...SO OPTION C IS CORRECT..
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