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# Electrical Engineering - Transformers - Discussion

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"No one is as deaf as the man who will not listen."
- (Proverb)
3.

When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is

 [A]. 12 V [B]. 120 V [C]. 240 V [D]. 2,400 V

Explanation:

No answer description available for this question.

 Ashar said: (Sat, Dec 4, 2010 12:10:11 PM) n1/n2= 1/20=vi/v2 20*12=240

 Nitesh said: (Mon, Dec 20, 2010 03:33:02 AM) Turning ratio = n2/n1=20 primary volt=12v sec. volt=? n2/n1=v2/v1 20=v2/12 v2=240v

 Vidhya said: (Tue, Jan 11, 2011 07:01:10 PM) K=N2/N1=V2/V1 20=V2/12 V2=12*20 V2=240V

 Nani said: (Thu, Jan 27, 2011 09:57:04 AM) Given ,k=20 (k=turns ratio) and primary AC voltage is 12v, We have to find secondary voltage=?, as we know that, turns ratio=k=N2/N1, K=N2/N1=20 (SECONDARY VOLTAGE/PRIMARY VOLTAGE)=v2/v1=v2/12, THEREFORE, N2/N1=V2/V1, 20=V2/12 V2=20*12=240

 Kunal said: (Wed, Feb 9, 2011 04:03:38 AM) In transformer t1/t2=v2/v1 20=v2/12, v2=20*12=240

 Sandhya S said: (Thu, May 5, 2011 12:02:42 AM) vs/vp=20 vs/12=20 vs=20*12 vs=240

 Jodagay said: (Sat, Jun 11, 2011 05:58:19 AM) Very simple::. 20*12=240.

 Pinnapareddy.Sandhya Lakshmi said: (Mon, Jun 27, 2011 10:07:28 PM) v2/v1=n2/n1=k here k=20,v1=12v v2/12=20 v2=240v

 Nikhilesh said: (Tue, Aug 9, 2011 12:12:47 AM) v2/v1 = n2/n1 = i1/i2 = k (this is standard ratio) n2/n1 = 20 (given) 20=v2/v1 v2=20*12 =240

 Mani said: (Tue, Sep 6, 2011 07:41:55 PM) E1/E2=N1/N2; N1/N2=20; so E2=20*12=240volts

 Veerendra Singh said: (Sun, Sep 25, 2011 11:02:02 AM) K(Turning ratio)=V2/V1 V2=20*12 =240v

 Sameer Kamble said: (Tue, Dec 13, 2011 02:38:54 PM) Transformer ratio(K) = n2/n1,v2/v1=20. So v2/v1 = 240/12 = 20.

 Naresh Kumaar said: (Wed, Dec 14, 2011 09:51:55 PM) Here we have given turn ratio k=n2/n1=20. primary voltage v1=12v. secondary voltage v2=? v2/v1=n2/n1 v2=(n2/n1)v1 v2=20*12=240v

 Rupambika said: (Fri, Dec 23, 2011 11:08:44 AM) Given data turn ratio k=20 primary voltage v1=12v. according to the formula v2/v1= k => v2/12v= 20 => v2= 20*12v =240v hence the secondary current is 240v. AM I RIGHT?

 Sundar said: (Mon, Jan 23, 2012 09:51:15 PM) Turns ratio (N2/N1) = 20 [or] N2/N1 = 20/1 N2 = 20 N1 = 1 V1 = 12V V2 = ? Formula: V1/V2 = N1/N2 [or] V2/V1 = N2/N1 Therefore, V2 = V1. (N2/N1) V2 = 12 x (20) = 240v.

 Suvankar said: (Thu, Jan 26, 2012 12:39:20 PM) Guys, I m confused. The turns ratio of a transformer is T1/T2=20 Primary turns to the secondary turns is called the turns ratio. i.e. and E1/E2=T1/T2 [Refer Ashfaq Hussian, Electric machines, page no 3] The ans should be, E2=E1/20 i.e. E2= 12/20=0.6 Isnt it??

 Gayathri.K said: (Fri, Jan 27, 2012 12:27:09 PM) 12*20=240v secondary voltage = number of turns ratio * voltage in primary secondary voltage = 12*20 secondary voltage = 240 volts

 Khalid Akbar said: (Wed, Feb 15, 2012 07:51:28 PM) 20 Ratio Mean Primary is 1turn and secondary turns are 20 So if secondry voltage is 12 V So 20*12=240volts

 Ramesh said: (Fri, Apr 6, 2012 05:55:25 PM) Here the given data N1=20 V1= 12 N2/N1=V2/V1 V2?= n1*vi=20*12=240 N2 ?= n1*v2/n1 =20*240/12=400 Secondary voltage = 240 volts Secondary turn= = 400t

 Pankaj Kumar said: (Sat, Apr 14, 2012 11:34:42 AM) K=N2/N1=E1/E2 Given that; K=20,E1=12V 20=E2/12 E2=240V

 Sadasiva said: (Mon, May 7, 2012 06:49:10 PM) N2/N1=V2/V1 Here N1=1,N2=20 V1=12; So V2 = N2*V1 V2 = 20*12 V2 = 240v

 Uday said: (Fri, Jun 22, 2012 05:28:00 PM) V2/V1=N2/N1=I1/I2=K (TURNS RATIO). SO V2/V1=K. V2/12=20. V2=20*12=240V.

 Varun said: (Sun, Jun 24, 2012 06:45:14 PM) V2/V1=N2/N1. V2/12=20. V2=20*12=240.

 Jitendranath Panda said: (Wed, Jun 27, 2012 03:08:51 PM) We know, V1/V2=T1/T2=A2/A1. Hear T1/T2=20, T1=12, So V2=12*20=240V.

 Krishna said: (Mon, Jul 30, 2012 03:20:09 PM) Given, k=20 (k=turns ratio). And primary AC voltage is 12v, We have to find secondary voltage = ?, As we know that, turns ratio = k = N2/N1, K=N2/N1=20. (SECONDARY VOLTAGE/PRIMARY VOLTAGE) = v2/v1 = v2/12, THEREFORE, N2/N1= V2/V1, 20 = V2/12 V2 = 20*12 = 240.

 Raki&Amp;Viji said: (Sat, Aug 25, 2012 11:36:53 AM) Ratio=N2/N1=V2/V1 V2=V1*RATIO =12*20 =240V

 Uma.M said: (Wed, Sep 5, 2012 07:00:02 PM) We know that k = v2/v1. Here v1 = primary voltage = 12. Turns ratio k = 20. So 20 = v2/12 i.e., v2 = 240v.

 Manash said: (Sat, Nov 10, 2012 07:25:58 PM) We know, N2/N1=E2/E1=K According to question N2/N1=E2/12=20 =>20=E2/12 =>E2=12*20 =240V

 Alka said: (Sat, Dec 22, 2012 10:40:06 AM) k=v2/v1 k=20 v1=12 k=v2/v1 20=v2/12 v2=240v

 Parth said: (Sat, Jan 5, 2013 03:08:50 PM) k = v2/v1; v1 = primary voltage = 12. Turns ratio k = 20. So 20 = v2/12 i.e., v2 = 240v.

 Praveen Nair said: (Sat, Mar 30, 2013 11:41:35 PM) N2/N1 = V2/V1 = I1/I2 = Turns ratio. :. V2 = 20x12 = 240V.