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 7 of 7.
P.RAJESH said:
8 years ago
How to identify sum in take primary turn or a Secondary turn? digit.
Sai said:
8 years ago
You are correct @Veena. I agree with you.
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)
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)
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)
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)
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)
Hars bardhan said:
5 years ago
It's a step-up transformer.
(2)
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)
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