Electrical Engineering - Transformers - Discussion
Discussion Forum : Transformers - General Questions (Q.No. 3)
3.
When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is
Discussion:
69 comments Page 1 of 7.
Veena said:
9 years ago
Turns ratio= 1/k.
So 1/k = v1/v2.
20 =12/v2,
v2 = 12/20,
v2 =0.6v.
So, Options are wrong.
So 1/k = v1/v2.
20 =12/v2,
v2 = 12/20,
v2 =0.6v.
So, Options are wrong.
(6)
Adam mohammed said:
3 years ago
Turns ratio :a=V2/V1.
then 20=V2/12,
V2=20*12=240,
So, V2=240v.
then 20=V2/12,
V2=20*12=240,
So, V2=240v.
(4)
Biswajit barik said:
6 years ago
No, the right answer is 0.6V in case of the ideal transformer if we assume permeability is infinite in ideal transformer then in case of ideal transformer in loaded condition N1I1=N2I2so in that condition we say I1/I2=N2/N1=1/a so that but practical transformer with finite permeability then this relation not valid because of I=Inot+I2.
Here transformation ration only practical transformer is E1/E2=N1/N2.
Here transformation ration only practical transformer is E1/E2=N1/N2.
(4)
Vicky said:
6 years ago
Turn ratio = N1/N1=20.
Transformation ratio = V2/V1 = N2/N1.
i.e, V2/V1= 1/20.
V2 = 12/20,
V2 = 0.6 .
Transformation ratio = V2/V1 = N2/N1.
i.e, V2/V1= 1/20.
V2 = 12/20,
V2 = 0.6 .
(3)
Hars bardhan said:
5 years ago
It's a step-up transformer.
(2)
Sanchayan Singha Roy said:
5 years ago
Let the turns ration be k.
k =N2/N1.
Now, we know that V1/V2 = N1/N2.
24/V2 = 1/20 [as k = N2/N1],
V2= 240v.
k =N2/N1.
Now, we know that V1/V2 = N1/N2.
24/V2 = 1/20 [as k = N2/N1],
V2= 240v.
(2)
Lalita said:
5 years ago
Some are saying that 0.6 is the right answer, But it's wrong. the right answer is 240.
E2/E1 = V2/V1 = N2/N1 = K.
N2/N1 = 20.
V1 = 12.
So, 20 = V2/V1.
20 = V2/12.
20*12 = V2.
V2 = 240.
E2/E1 = V2/V1 = N2/N1 = K.
N2/N1 = 20.
V1 = 12.
So, 20 = V2/V1.
20 = V2/12.
20*12 = V2.
V2 = 240.
(2)
Instructor said:
7 years ago
Anyone that got 240 volts for a secondary voltage is incorrect.
The correct answer should 0.6 volts.The reason being is that the equation for turns ratio is (N1/N2)=(V1/V2). We are given (N1/N2) - our turns ratio - to be 20 and V1 is 12. So, 20=12/V2, therefore, V2 is 0.6.
The correct answer should 0.6 volts.The reason being is that the equation for turns ratio is (N1/N2)=(V1/V2). We are given (N1/N2) - our turns ratio - to be 20 and V1 is 12. So, 20=12/V2, therefore, V2 is 0.6.
(1)
Anand said:
1 decade ago
Actually turn ratio of transformer is given by n1/n2.
Therefore if turn ratio is 20 then the answer is 12/20. There is some mistake in the question.
Therefore if turn ratio is 20 then the answer is 12/20. There is some mistake in the question.
Akash.bhure said:
1 decade ago
Solution:
Turns ratio(K) = 20.
Primary voltage = 12.
N2/N1 = V2/V1.
V2 = N2/N1*V1.
V2 = 20*12 = 240V.
Turns ratio(K) = 20.
Primary voltage = 12.
N2/N1 = V2/V1.
V2 = N2/N1*V1.
V2 = 20*12 = 240V.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers