Electrical Engineering - Transformers - Discussion
Discussion Forum : Transformers - General Questions (Q.No. 10)
10.
A transformer with a 110 V primary has a 15:1 turns ratio. The load resistance, RL, is 120 
. What is the approximate voltage across the load?
. What is the approximate voltage across the load?Discussion:
53 comments Page 2 of 6.
PRASUN PARASHAR said:
10 years ago
Dear friends;
Always we take.
Turn ratio = Primary side (voltage)/Secondary side voltage.
Also it is given. Primary voltage is 110 volts.
So don't be confused.
Always we take.
Turn ratio = Primary side (voltage)/Secondary side voltage.
Also it is given. Primary voltage is 110 volts.
So don't be confused.
Anonymous said:
10 years ago
N1 = 15. N2 does not = 15. N2 = 1.
Pintoo said:
10 years ago
Hello guys,
For step down transformer, turn ratio > 1.
For step down transformer, turn ratio < 1.
Here turn ratio is 15, that means greater than 1 then we can say that this is a step down transformer.
So O/P will be less than 110 volt and formula will be Np/Ns = 15/1.
For step down transformer, turn ratio > 1.
For step down transformer, turn ratio < 1.
Here turn ratio is 15, that means greater than 1 then we can say that this is a step down transformer.
So O/P will be less than 110 volt and formula will be Np/Ns = 15/1.
Ahmed Z said:
10 years ago
When we speak of turns ratio, it means ratio of primary turns to secondary turns i.e. N1:N2.
Pawan Choudhury said:
10 years ago
N2/N1 = V2/V1.
As per the question N2 = 1, N1 = 15 and v1 = 110.
Putting this in above formula. We can get the value of v2. i.e. 7.3 v.
Have a nice day!
As per the question N2 = 1, N1 = 15 and v1 = 110.
Putting this in above formula. We can get the value of v2. i.e. 7.3 v.
Have a nice day!
Rhul said:
10 years ago
What you guys are talking I m totally confused.
Sumukh said:
10 years ago
Is it necessary to consider the turns ratio primary as to secondary or secondary as to primary? Please explain.
Vineet said:
1 decade ago
I am confused in some questions they are taking turn ratio to be N2/N1 while in others they are taking it N1/N2.
SIDDIK said:
1 decade ago
It is step down transformer from there turn ratio.
PRAVEEN KUMAR said:
1 decade ago
Turns ratio = N1/N2 always and Transformation Ratio = N2/N1 = E2/E1 = I1/I2.
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