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

Answer: Option B

Explanation:

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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

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

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

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)

1220=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?= n1vi=2012=240 N2 ?= n1v2/n1 =20240/12=400 Secondary voltage = 240 volts Secondary turn= = 400t

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.

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.

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

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.