Discussion :: Transformers - General Questions (Q.No.24)
A transformer has a 1:6 turns ratio and a secondary coil load resistance of 470 . The load resistance as seen by the source is
Answer: Option D
No answer description available for this question.
|Durgaprasad said: (Apr 15, 2011)|
|Siva said: (Feb 29, 2012)|
|Darwin said: (May 17, 2012)|
|Given, N(pri):N(sec) = 1:6
R = 470 ohm
So, Relective Resistance = [(1/n)^2]*R = 470/36 = 13.055
Where, n = N(sec)/N(pri) = 6
|Patil said: (Jun 19, 2015)|
|Is transformer ratio always N2/N1?|
|Kazi Jasimuddin said: (Sep 8, 2015)|
|If the relation between turns ratio and resistance is n1/n2=sqrt (r1/r2) then answer will be 78.|
|Basu Patil said: (Mar 5, 2016)|
|Thank you lot indiabix. Friends I have doubt, is transformer ratio is constant or not? because I have seen.
Two types i.e. N2/N1 And N1/N2. Which one is correct ? please clear my confusion.
|Sudhir said: (Apr 9, 2016)|
|Zin or Zsource = ZL(load impedance)/n^2. Here n is turned ratio.|
|Susanta said: (Sep 14, 2016)|
|Transformatio ratio(k) = N2/N1.
Turns ratio(n) = N1/N2.
therefore, n = 1/k.
Don't be confused between transformation ratio & turns ratio.
|Kuna said: (Dec 10, 2016)|
|The turn ratio n1/n2 =√ (r2/r1) = 13.|
|Lakshman Rao said: (Jan 24, 2017)|
|But they mentions turns ratio as 1:6.
We are taken turns ratio in transformer n2/n1.
So where n2 = 1 and n1 = 6.
Then what happen? Please explain.
|Sai Kumar said: (May 17, 2017)|
That is transformation ratio = k.
Turns ratio = N1/N2.
Transformation ratio N2/N1 = k.
|Narasimha Reddy said: (May 27, 2017)|
|I totally confused.
Is it n1/n2 or n2/n1?
|Walid said: (Aug 4, 2018)|
|Guys it's turns ratio so n1/n2 =1/6 = 0.16.
And R1=R2*(turns ratio)^2 =470 * 0.025 = 13.
|Majid Mahmood said: (Aug 19, 2019)|
1/6 = 0.166.
When ratio is less than one mean step up use v2/v1 otherwise use v1/v2.
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