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 3 of 6.
Sudhansu said:
1 decade ago
k = n1/n2 = e1/e2 = i2/i1.
Praveen said:
1 decade ago
What is the formula for K please tell me?
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.
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.
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.
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.
Duryodhan kumar mandal said:
1 decade ago
N1/N2 = V1/V2.
Than putting value,
15:1 = 110:v2.
=> v2 = 110*1/15.
=> v2 = 7.33v.
Than putting value,
15:1 = 110:v2.
=> v2 = 110*1/15.
=> v2 = 7.33v.
Jyotindra said:
1 decade ago
We know k = n2/n1.
And here 15:1 is given,
Therefore k = 15:1.
Or n2/n1 = 15/1 = v2/v1.
So we get v2 = (n2/n1)*v1,
= (15/1)*110 = 1650v answer.
But there is no option. Therefore we go on this way,
n1:n2 = 15:1.
We get v2 = 7.333 v.
And here 15:1 is given,
Therefore k = 15:1.
Or n2/n1 = 15/1 = v2/v1.
So we get v2 = (n2/n1)*v1,
= (15/1)*110 = 1650v answer.
But there is no option. Therefore we go on this way,
n1:n2 = 15:1.
We get v2 = 7.333 v.
Prashanth nive.. said:
1 decade ago
Given value N1:N2 = 15 : 1 (That is N1 = 15, N2 = 1).
Turns ratio = (N1/N2) = 15/1 (ratio > 1 ; Step down transformer).
As you said, V2/V1 = N2/N1.
V2/110v = 1/15.
V2 = 110v/15.
V2 = 7.3333... volts.
Hope this will help to clear your doubts. Have a nice day!
Turns ratio = (N1/N2) = 15/1 (ratio > 1 ; Step down transformer).
As you said, V2/V1 = N2/N1.
V2/110v = 1/15.
V2 = 110v/15.
V2 = 7.3333... volts.
Hope this will help to clear your doubts. Have a nice day!
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