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 1 of 6.
Guna said:
7 years ago
In the transformer,
The Turns ratio means N1/N2.
And transformation ratio Means = N2/N1 = k.
So, that N1/N2 = 1/15.
The Turns ratio means N1/N2.
And transformation ratio Means = N2/N1 = k.
So, that N1/N2 = 1/15.
(3)
Pritul Panchal said:
7 years ago
Given Data:
1. Primary Voltage: 110V.
2. Turns ratio: 15:1 (15=Primary turns, 1=Secondary Turns).
V1/V2 = N1/N2.
110/V2 = 15/1.
110*1/ 15 = V2.
Hence V2 = 7.3V across transformer secondary winding.
Now, load is of 120Ohm connected across the secondary winding.
So, the load will face the same secondary voltage.
1. Primary Voltage: 110V.
2. Turns ratio: 15:1 (15=Primary turns, 1=Secondary Turns).
V1/V2 = N1/N2.
110/V2 = 15/1.
110*1/ 15 = V2.
Hence V2 = 7.3V across transformer secondary winding.
Now, load is of 120Ohm connected across the secondary winding.
So, the load will face the same secondary voltage.
(9)
Imran ali said:
7 years ago
It is so simple just use formula.
N1/N2=V1/V2.
then
put values
15/1=110/V2 (finding value of V2 we can write V2).
so on.
15= 110/V2 then cross multiplying.
V2=110/15,
V2=7.3v.
N1/N2=V1/V2.
then
put values
15/1=110/V2 (finding value of V2 we can write V2).
so on.
15= 110/V2 then cross multiplying.
V2=110/15,
V2=7.3v.
(2)
Aswini said:
7 years ago
Why did they mention reluctance here?
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.
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)
Mahendar said:
8 years ago
What's the correct formula for turns ratio of transformer?
n2/n1 or n1/n2.
n2/n1 or n1/n2.
Puja said:
9 years ago
Please tell me, what is the actual turns ratio?
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.
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.
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