Electrical Engineering - Transformers - Discussion
Discussion Forum : Transformers - General Questions (Q.No. 7)
7.
To step 110 V ac down to 20 V ac, the turns ratio must be
Answer: Option
Explanation:
Vp/Vs = Np/Ns
Vs = (Ns/Np)Vp
We required turns ratio i.e., (Ns/Np)
= Vs/Vp
= 20/110
= 0.181818182
[Note: p - primary; s - secondary]
For step down transfer, the turns ratio will be less than 1.
For simulation: Step-Down Transformer Circuit Simulator.
Discussion:
29 comments Page 2 of 3.
Vinit Ghone said:
1 decade ago
What is the main turns ratio? Am way to confused. Please help me. What's is the relation v2/v1 = i1/i2 = n2/n1 or what?
Sushama said:
1 decade ago
My ans is 0.18.
Here,
Given data v1=110 v2=20
We know ratio=n2/n1
So,n2/n1=v2/v1
n2/n1=20/110 = 0.1818182
Here,
Given data v1=110 v2=20
We know ratio=n2/n1
So,n2/n1=v2/v1
n2/n1=20/110 = 0.1818182
Jaydeep said:
5 months ago
Standard Definition:
Turns Ratio K = N1/N2
N1 = Primary winding turns.
N2 = Secondary winding turns.
Turns Ratio K = N1/N2
N1 = Primary winding turns.
N2 = Secondary winding turns.
Vivek prasad said:
1 decade ago
According to IEEE, Turns ratio = high voltage turns / low voltage turns
So turn ratio = 110 / 20 = 5.5.
So turn ratio = 110 / 20 = 5.5.
Amani naidu said:
9 years ago
n2/n1 is the transformation ratio.
n1/n2 is the turns ratio.
n1/n2 = v2/v1.
So, the answer is 0.1818.
n1/n2 is the turns ratio.
n1/n2 = v2/v1.
So, the answer is 0.1818.
Hemant kumar said:
8 years ago
It's is confusing that, somewhere we used the turn ratio as n1/n2=v1/v2 or somewhere n2/n1=v2/v1.
(2)
Debraj said:
1 decade ago
I am confused.
It seems both are correct.
Please tell me the right ans and the right process.
It seems both are correct.
Please tell me the right ans and the right process.
Mahesh Varma said:
7 years ago
Turns Ratio N1/N2, V1/V2.
Transformation Ratio (K) is inverse of Turns ration N2/N1, V2/V1.
Transformation Ratio (K) is inverse of Turns ration N2/N1, V2/V1.
J.khan said:
1 decade ago
Its so simple
V2/V1= 20/110
0.1818182 ans
Where
v2 Secondry voltage
v1 peri voltage
V2/V1= 20/110
0.1818182 ans
Where
v2 Secondry voltage
v1 peri voltage
Sainath goud said:
1 decade ago
Turns ratio is N1/N2.
We know that N1/N2 = V2/V1.
N1/N2 = 20/110 = 2/11 = 0.181.
We know that N1/N2 = V2/V1.
N1/N2 = 20/110 = 2/11 = 0.181.
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