Electrical Engineering - Transformers - Discussion

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- Albert Einstein

A certain transformer has 400 turns in the primary winding and 2,000 turns in the secondary winding. The turns ratio is

[A].	0.2	[B].	0.4
[C].	5	[D].	25

Answer: Option D

Explanation:

No answer description available for this question.

Ranchod Gurjar said: (Sun, Jul 17, 2011 05:52:27 AM)

Turn ratio k=n2/n1=e2/e1=i1/i2 n2/n1=2000/400=5

Pawan said: (Wed, Aug 31, 2011 05:37:38 PM)

We know that:- Turn ratio=N2/N1; HERE N2=2000; N1=400; T.R=2000/400=5

Raghavendra said: (Mon, Oct 24, 2011 11:07:04 AM)

I think its wrong because turns ratio is different from transformation ratio transformation ratio k=1/n=V2/V1=I1/I2

K.Bhanu Chandar said: (Mon, Oct 24, 2011 02:05:48 PM)

n=v2/v1 n=2000/400 n=5

Mahendra said: (Sat, Nov 26, 2011 11:13:10 AM)

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.

Tanul said: (Sat, Dec 3, 2011 10:47:51 PM)

Turn ratio =N2/N1 or V2/V1. As given N2=2000 N1=400 so- 2000/400 = 5 ans.

Punyashree said: (Mon, Dec 26, 2011 07:13:12 AM)

trasformation ratio,k=N2/N1 turns ratio=1/k= N1/N2

Sainaz said: (Fri, Jan 6, 2012 09:43:30 AM)

Primary turns (n1) =400. Secandary turns (n2) =2000. Turns ratio (k) = n2/n1. =2000/400. Ans=5.

Jyothi said: (Tue, Feb 28, 2012 09:09:08 PM)

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.

Manish said: (Wed, Mar 21, 2012 09:32:47 PM)

TURN RATIO FORMULA=SECONDARY TURNS(N2)/PRIMARY TURNS(N1). SO, VALUE OF N2=2000 AND VALUE OF N1=400. =>N2/N1 =>2000/400=5. THIS IS ANS.

Rupesh Das said: (Sat, Apr 7, 2012 05:40:34 PM)

Primary turns(N1)=400 Secondary turns(N2)=2000 Turn Ratio(K)=N2/N1 =>2000/400=5. This Is Ans

Krishna Teja said: (Sat, May 5, 2012 10:11:50 AM)

But actually the formula for turns ratio is N1/N2 so the answer will be 0.2. Please reply why all taken it as N2/N1.

Naveen said: (Sat, May 12, 2012 03:46:10 PM)

so much confusion in the formula Turn ratio is N1/N2 or N2/N1. you have tried both the formula in two questions given here.

Gaurav Garg said: (Mon, Jun 18, 2012 01:30:40 PM)

We know turn ratio = (turn on h. V) / (turn on l. V). So, Turn ratio = 2000/400. Turn ratio = 5.

A.Veeravanchinathan said: (Wed, Jul 18, 2012 01:17:29 PM)

Transformation ratio = Vs/Vp = Es/Ep = Ns/Np = Ip/Is. = Ns/Np = 2000/400 = 5.

Venky said: (Wed, Aug 22, 2012 10:55:40 PM)

Here [always] turns ratio is H.V/L.V side

Cks said: (Fri, Aug 24, 2012 12:31:07 AM)

turns ratio =h.v(less current ,more turns)/l.v(more current, less turns)=2000/400=5

Avanish said: (Sat, Oct 6, 2012 08:23:51 AM)

Difference between turn and voltage ratio.

Vaibhav Sudhan said: (Fri, Feb 8, 2013 08:30:47 PM)

Secondary turns divided by the primary turns gives turn ratio. N2/N1 = turn ratio. 2000/400 = 5.

Vinod Bagodariya said: (Thu, Apr 4, 2013 04:51:37 PM)

Turns ratio = N2/N1. N2 = 2000. N1 = 400. T.R = N2/N1 = 2000/400 =5.

Narendra Singh said: (Sat, Apr 20, 2013 11:55:31 AM)

When we find the single voltage and number of turn then we use Vp/Vs = Np/Ns. But when we find the voltage or turn ratio it will reverse. Voltage ratio = Vs/Vp. Turn ratio = Ns/Np.

Tori said: (Tue, Apr 30, 2013 11:30:40 PM)

We know transformation ratio to be NP/NS=VP/VS=IS/IP. Now how come the answer is 5 instead of 0.2. Please can you come out clear with your formuler explanation?