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
Discussion:
94 comments Page 1 of 10.
Mkhan.q said:
4 years ago
@All.
Here, Everyone is presenting different logic. For the previous question, they applied v1/v2 = n1/n2 and here opposite formula, without logic
According to my point of view;
When it is step up.
V2/V1 = N2/N1.
And it is step down,
V1/V2 = N1/N2.
The question here is how to check whether it is step up or step down by just number Of turns?
If secondary has more turns, it means it is step up and vice versa for stepdown.
Here, Everyone is presenting different logic. For the previous question, they applied v1/v2 = n1/n2 and here opposite formula, without logic
According to my point of view;
When it is step up.
V2/V1 = N2/N1.
And it is step down,
V1/V2 = N1/N2.
The question here is how to check whether it is step up or step down by just number Of turns?
If secondary has more turns, it means it is step up and vice versa for stepdown.
(3)
K.Hanumantha said:
1 decade ago
Hi guys this is wrong right.
Because N1/N2 = 'n' this is turns ratio.
So answer is = 0.2. How it comes 5?
Transformer ratio is N2/N1 = V2/V1 = I1/I2 = K this is transformer ratio.
In the question they are clearly ask Turns ratio. Then how it comes this answer. Please due to that am confused in one of my Exam. So please tell clearly any one.
NI/N2 = 'n' turns ratio.
N2/N1 = K, this is transformer ratio.
Because N1/N2 = 'n' this is turns ratio.
So answer is = 0.2. How it comes 5?
Transformer ratio is N2/N1 = V2/V1 = I1/I2 = K this is transformer ratio.
In the question they are clearly ask Turns ratio. Then how it comes this answer. Please due to that am confused in one of my Exam. So please tell clearly any one.
NI/N2 = 'n' turns ratio.
N2/N1 = K, this is transformer ratio.
Hyacinth salim said:
9 years ago
Dear,
Turns ratio n = n1/n2, so answer is 0.2.
But, transformation ratio, voltage ration k = v2/v1 proportional.
Step up transformer - turns ratio less than 1.
Step down trfr - turns ratio greater than 1.
Matching transformer - turns ratio = 1.
But voltage transformation ratio is the other way step up - greater than 1, step down - less than 1.
Hope above is clear.
Turns ratio n = n1/n2, so answer is 0.2.
But, transformation ratio, voltage ration k = v2/v1 proportional.
Step up transformer - turns ratio less than 1.
Step down trfr - turns ratio greater than 1.
Matching transformer - turns ratio = 1.
But voltage transformation ratio is the other way step up - greater than 1, step down - less than 1.
Hope above is clear.
Rajkumar said:
1 decade ago
I remove your all confusion dears turn ration is always in the form of high voltage/low voltage it does not matter turn ratio is n1/n2 or n2/n1 we just take turn ratio is as the number of turns in high voltage side divided by no of turns in low voltage side so the answer five is correct ok to all of you.
JYOTHI said:
1 decade ago
How can we say the answer is 5 ? Because in this problem you are mentioned primay is 400,secondary is 2000.
So my answer is turns ratio is 0.2 .
Here somebody said the answer is 5. They mentioned clearly in the problem primary turns is 400, secondary turns is 2000.
Please tell the reason clearly.
So my answer is turns ratio is 0.2 .
Here somebody said the answer is 5. They mentioned clearly in the problem primary turns is 400, secondary turns is 2000.
Please tell the reason clearly.
S P said:
7 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).
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).
Naveen said:
6 years ago
According to IEEE, the turn ratio is defined as the ratio of HV to LV. The definition says nothing about primary or secondary.
HV side will be the side with greater no. of turns and LV side will be the side with fewer no. of turns.
therefore, a=HV/LV.
i.e 2000/400=5.
HV side will be the side with greater no. of turns and LV side will be the side with fewer no. of turns.
therefore, a=HV/LV.
i.e 2000/400=5.
(1)
Mahendra said:
1 decade ago
Transformer ratio is always mention in the form of N1/N2 so I suppose that the answer should be 0.2 because N1 showing primery & N2 is secondary. If answer is 5 than 2000 should be primary & 400 should be secondary.
Lalu Prasad Yadav said:
1 decade ago
Transformer ratio is the ratio of avg. Of all turns ratio taken as sample of interval with 10 min in standard temperature, time and pressure. While length is always in ratio of velocity of square of light.
Ok. Got it?
Ok. Got it?
AYYUBKHAN said:
9 years ago
Transformer primary side = 400turns.
Transformer secondary side = 2000 turns.
Calculate transformer ratio?
Transformer ratio(k) = n2/n1,
= 2000/400.
Transformer ratio(k) = 5.
Transformer secondary side = 2000 turns.
Calculate transformer ratio?
Transformer ratio(k) = n2/n1,
= 2000/400.
Transformer ratio(k) = 5.
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