Discussion :: Transformers - General Questions (Q.No.19)
To step 120 V ac up to 900 V ac, the turns ratio must be
Answer: Option C
No answer description available for this question.
|Abby Joseph said: (Dec 15, 2010)|
Here V1 is 120, V2 is 900 so
|Ahmed Al Rawas said: (May 20, 2011)|
|Why shouldn't be N1/N2 = v1/v2
thus, N1/N2 = 120/900 = .133
isn't that right ??
|Ambrish said: (Jul 7, 2011)|
|Yeah my doubt is also same ?|
|Murugaperumal said: (Aug 10, 2011)|
|It is step up transformer so,
|Pruthvi said: (Aug 15, 2011)|
|Is turns ratio different for step up and step down transformer?|
|Mahijagadeesh said: (Sep 2, 2011)|
|Turns ratio means the ratio of primary turns to secondary turns is it wrong?
But why in this problem took reverse.
|Yogesh Sabota said: (Nov 4, 2011)|
|I agree with Mahijagadeesh
this answer is incorrect
It should be 0.13v
|Asim Juneja said: (Jan 22, 2012)|
|N2/N1 is transformation ratio while,
N1/n2 is turns ratio,
thus my perception says correct ans. is 0.13
|Mahesh Pakki said: (Mar 26, 2012)|
|Guys ... please remeber for
step down transformer , turns ratio < 0
Step up transformer , turns ratio > 0 ..
In this question .. its step up .. hence turns ratio should be greater then zero ..
|Sirisha said: (May 24, 2012)|
|Turns ratio=N1/N2. (step down).
Turns ratio=N2/N1. (step up).
If not mentioned the type of tx by default consider step up.
|Amarjyoti Sarmah said: (Aug 15, 2013)|
|Is turns ratio different for step up and step down transformer?
N2/N1 is transformation ratio while,
N1/N2 is turns ratio, Is not it right. I am very much confused. Please help me?
|Naveed said: (Oct 20, 2013)|
|The ratio of a four-to-one step-down transformer is written as 4:1.The ratio of a one-to-four step-up transformer should be written as 1:4. Notice in the two ratios that the value of the primary winding is always stated first.|
|Rajan India said: (Mar 16, 2015)|
|Turns ratio k = v2/v1.
Here, k = Turns ratio of transformer.
v2 = Secondary voltage of transformer.
v1 = Primary voltage of transformer.
|Vicky said: (Jan 3, 2016)|
|Turns ratio means ratio of high voltage side to low voltage side turns.|
|Stuti Kushwaha said: (Feb 16, 2016)|
|Please help me that where we can use n1/n2 and where we can use n2/n1?|
|Mehaboob Nadaf said: (Mar 20, 2016)|
|N2/N1 = V2/V1.
900/120 = K=7.5.
|San said: (Mar 24, 2016)|
|Is it same for V2/V1, R2/R1 & I1/I2?|
|Raghuvamsi said: (Apr 29, 2016)|
The answer should be 0.13.
Here the problem is asking turns ratio, not transformation ratio.
|Ramesh said: (Jun 16, 2016)|
|Finally, what is the correct answer?|
|Ajit said: (Nov 22, 2016)|
|Yes, I agree the answer is 0.13.|
|Sanjay Patil said: (Nov 24, 2016)|
|Yes, Agree with the answer 0.13.
Because N2/N1= V2/V1= I1/I2 it is transformation ratio and N1/N2 is Turn Ratio.
|Teja said: (Jun 20, 2017)|
|Turns ratio is primary to secondary. So the answer is wrong.|
|Aditya Singh said: (Apr 14, 2018)|
|Yes, the answer should be 0.13.|
|Ankita Mali said: (Dec 23, 2018)|
|What is the final answer? Please tell me.|
|Shivam said: (Sep 29, 2019)|
|Answer will be 0.13.
Because turn ratio is inverse of transformation ratio.
|Sayan Paul said: (Nov 2, 2020)|
|Abhinaya said: (Apr 15, 2021)|
|I agree with 0.13 the 7.5 is k.
Turns ratio = 1/K,
1/7.5 = 0.13.
|Srinivas Reddy said: (Jul 5, 2021)|
|To step up by means N2/N1 high voltage to low and step down N1/N2.|
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