Electrical Engineering - Transformers - Discussion
Discussion Forum : Transformers - General Questions (Q.No. 14)
14.
The primary coil of a transformer is connected to a 60 V ac source. The secondary coil is connected to a 330 
load. The turns ratio is 3:1. What is the secondary voltage?
load. The turns ratio is 3:1. What is the secondary voltage?Discussion:
27 comments Page 2 of 3.
Pratap Kumar said:
10 years ago
Turn ratio = N2:N1 = 3:1.
This is the basic fundamental all we have to aware.
Now solve answer is 180.
This is the basic fundamental all we have to aware.
Now solve answer is 180.
Archana said:
10 years ago
Transformation ratio is N2/N1 and Turns ratio is N1/N2 is this right?
Punnam chander said:
1 decade ago
N1:N2 = 3:1.
R-L = 330 ohms.
N2/N1= 1/3.
N2/N1= V2/V1.
V2 = 20 but this one is not answer he asking about across the R-L.
So, V2 = (I)(R-L).
I = V2/RL = 20/330.
I = 2/33.
V2 = (2/33)*(330) = 20.
R-L = 330 ohms.
N2/N1= 1/3.
N2/N1= V2/V1.
V2 = 20 but this one is not answer he asking about across the R-L.
So, V2 = (I)(R-L).
I = V2/RL = 20/330.
I = 2/33.
V2 = (2/33)*(330) = 20.
Preeti Hazarika said:
1 decade ago
Case1: For step down transformer, primary has more turns than secondary.
Thus N2=1 & N1=3, So Turns ratio, N2/N1=1/3.
In that way Option B is correct.
Case 2: For step up transformer, N2/N1=3/1,
In this case option C will be correct.
In this question volt drop is there due to resistance thus 1st case seems valid.
Thus N2=1 & N1=3, So Turns ratio, N2/N1=1/3.
In that way Option B is correct.
Case 2: For step up transformer, N2/N1=3/1,
In this case option C will be correct.
In this question volt drop is there due to resistance thus 1st case seems valid.
Sanju said:
1 decade ago
Turn ratio is n2/n1 always.
RAMYA S said:
1 decade ago
What is the difference b/w turns ratio and transformer ratio?
Akash.bhure said:
1 decade ago
Solution:
Primary voltage(V1) = 60V.
Turns ratio(K) = N2/N1 = V2/V1.
V2 = N2/N1*V1.
V2 = 1/3*60 = 60/3 = 20V.
Primary voltage(V1) = 60V.
Turns ratio(K) = N2/N1 = V2/V1.
V2 = N2/N1*V1.
V2 = 1/3*60 = 60/3 = 20V.
Kalyan said:
1 decade ago
Turn ratio was given as 3:1 that means n2=3 and n1= 1 and I agree to @Rohinthh.
Mukesh said:
1 decade ago
Since turn ratio is 3:1, means k>1 so this is step down transformer. Primary has 60v so the secondary should low voltage than primary that's why 60/30 = 20v.
K sravanthi said:
1 decade ago
If the transformer Ratio is 3 or any other numbere given as single digit then we have to consider n2:n1.
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