Electrical Engineering - Transformers - Discussion

Discussion Forum : Transformers - General Questions (Q.No. 5)
5.
A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is
0.2
0.4
5
25
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
94 comments Page 4 of 10.

Avinash Km said:   5 years ago
Turns ratio = N2/N1.
= 2000/400.
Ans = 5.

Sangameshwar said:   6 years ago
1) Turns ratio in terms of number of turns is given by = higher number of turns/lower number of turns.

2) Turns ratio in terms of voltage is given by= low voltage/high voltage.

Khademul Islam said:   7 years ago
Turn ratio is always N1/N2 which is always inverse of transformation ratio K & K=N2/N1.
Here the answer is 0.2.

Mudasser Rahim said:   7 years ago
The answer is wrong there is a difference between the turn ratio and transformation ratio.

So, the Answer should be 400/2000= 0.2.

Prabha said:   8 years ago
Turns ratio.

I think n1/n2 because transformation ratio is n2/n1 once you cross I agree @Jyothi.

S P said:   8 years ago
Turn Ratio:

It is defined as the ratio of primary to secondary turns.
TR= N1/N2.
and

Transformation Ratio
The transformation ratio is defined as the ratio of the secondary voltage(or turns) to the primary voltage(or turns). It is denoted by K.
K= (E2/E1) or (N2/N1) or (I1/I2).

Balu said:   8 years ago
Turns ratio N1/N2 & transformation ratio N2/N1.

Sunayana said:   8 years ago
Answer is 0.2.
Turns ratio is n1/n2.
Transformation ratio is n2/n1.

Akshay sontakke said:   9 years ago
Turns Ratio = Np/Ns.
It depends upon how the winding is connected.
In the given question,
Np = 400.
Ns = 2000.

Hence, Np/Ns= 400/2000 = 0.2.
So the turn Ratio is 0.2.

Ashok reddy said:   8 years ago
The turns ratio=n1/n2.
400/2000=0.2.


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