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.
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)
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)
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)
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)
Debarshi Majumder said:
1 decade ago
V1/V2 = N1/N2.
V2 = 110/15 = 7.33.
But does it mean that the voltage across Rl=7.33?
V2 = 110/15 = 7.33.
But does it mean that the voltage across Rl=7.33?
Ritesh sharma said:
1 decade ago
See here the most confusing part is TURN RATIO. Which is a per my knowledge is N2/N1. As it is used in earlier question of this quiz. As per this ratio the answer is 1650. I do not know why people are saying that since the answer 1650 is not there so they are using another formula which is reverse of this.
Akash said:
1 decade ago
Turns ratio(K) = N2/N1= V2/V1.
V2/110 = 1/15.
So, V2 = 1/15*110.
V2 = 110/15 = 7.33.
V2/110 = 1/15.
So, V2 = 1/15*110.
V2 = 110/15 = 7.33.
Sarvesh kotiyal said:
1 decade ago
When the turn ratio comes its simple means secondary/primary winding.
Here turn ratio = N2/N1 = 15/1.
& VOLTAGE RATIO = 110/V2?
N1/N2 = V1/V2 OR N2/N1 = V2/V1.
=> N2/N1 = 15/1 =110/V2.
V2 = 110/15.
Here turn ratio = N2/N1 = 15/1.
& VOLTAGE RATIO = 110/V2?
N1/N2 = V1/V2 OR N2/N1 = V2/V1.
=> N2/N1 = 15/1 =110/V2.
V2 = 110/15.
Follewer of Einstien said:
1 decade ago
Hey Friends. Its provided ratio of turns NOT TURNS RATIO.
Means. TURNS RATIO = 10 i.e. N2/N1.
And ratio of turns = 10:1 means N1:N2.
Please don't get confused.
Means. TURNS RATIO = 10 i.e. N2/N1.
And ratio of turns = 10:1 means N1:N2.
Please don't get confused.
Praveen said:
1 decade ago
What is the formula for K please tell me?
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