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 5 of 6.
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.
Anonymous said:
10 years ago
N1 = 15. N2 does not = 15. N2 = 1.
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.
Wasim iqbal said:
9 years ago
Ns : Np = 15 : 1.
So, Ns = 1 ; Np = 15.
Vp = 110.
Here the relation is Ns / Np = Vs / Vp.
Substituting the values, we get:
Vs = 7.3V.
So, Ns = 1 ; Np = 15.
Vp = 110.
Here the relation is Ns / Np = Vs / Vp.
Substituting the values, we get:
Vs = 7.3V.
Er Sahal said:
9 years ago
N2 / N1 = V2 / V1,
1 / 15 = V2 / 110,
0.0666666667 - 110 = V2,
V2 = 7.3 V.
1 / 15 = V2 / 110,
0.0666666667 - 110 = V2,
V2 = 7.3 V.
Puja said:
9 years ago
Please tell me, what is the actual turns ratio?
Mahendar said:
9 years ago
What's the correct formula for turns ratio of transformer?
n2/n1 or n1/n2.
n2/n1 or n1/n2.
Shenbalaxmi said:
8 years ago
Here, Turns ratio with Primary is 15:1, So, I take it as N1=15, N2=1.
Normally, Turns ratio formula will be N2/N1.Some times it change accordingly with the question.
v1/v2 = n1/n2
110/v2 = 15/1
v2 = 110/15
v2 = 7.3V(Step down Xr).
But why they gave load resistance value?
Normally, Turns ratio formula will be N2/N1.Some times it change accordingly with the question.
v1/v2 = n1/n2
110/v2 = 15/1
v2 = 110/15
v2 = 7.3V(Step down Xr).
But why they gave load resistance value?
(1)
Kiran kumar said:
8 years ago
v2=RL-v1/turn ratio*1/1,
v2=120-110/15*1/1,
v2=7.3 Answer.
v2=120-110/15*1/1,
v2=7.3 Answer.
Aswini said:
7 years ago
Why did they mention reluctance here?
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