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.
Vinay said:
1 decade ago
N1/N2=V1/V2
15/1=110/V2
V2=110/15
V2=7.3
SAME ACROSS THE RL LAOD
15/1=110/V2
V2=110/15
V2=7.3
SAME ACROSS THE RL LAOD
Imran said:
1 decade ago
V2/V1=N2/N1
V2/110=15/1
V2=1650
What is the problem with this ?
V2/110=15/1
V2=1650
What is the problem with this ?
Sundar said:
1 decade ago
@Imran
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!
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!
Anu said:
1 decade ago
This question is not clear to me as earlier we used this formula :
N2/N1 = V2/V1
hence here also
(N2/N1) = 15/1
Thus ans should be
15/1=V2/10
V2=150
Please make it clear
N2/N1 = V2/V1
hence here also
(N2/N1) = 15/1
Thus ans should be
15/1=V2/10
V2=150
Please make it clear
Madhusudan said:
1 decade ago
@sundar.
In above ques. It is not mentioned that it is a step down or step up.
In above ques. It is not mentioned that it is a step down or step up.
Donald godide said:
1 decade ago
Ratio determines whether its a stepdown or stepup here it is said that the ratio is 15:1 so it a stepdown using our ratio for calculations 15=110 1=x we cross multiply x=110/15 which iz equal to 7.333
Kuldeep Bisht said:
1 decade ago
Some guye are confused,Plz note when ever turn ratio is shown in ratio i.e 15:1 it is always primary:secondary,Hence here N2=15 & N1=1
THUS V2=(N2/N1)*V1 U WILL GET 7.333v
THUS V2=(N2/N1)*V1 U WILL GET 7.333v
Sandy said:
1 decade ago
Ans is 7.33 according to v1/v2=k.
Sujoy said:
1 decade ago
Since V2/V1 + N2/N1
In the ques, N2/N1 can b either 15: 1 or i: 15 depending on the type of transformer ( step up or step down)
If it is step up it is 15 : 1 &, if it is step down, it is 1 : 15
Solve 4 both values to get V2 and look at the options whch value of V2 falls correct.
Have a nice day !
In the ques, N2/N1 can b either 15: 1 or i: 15 depending on the type of transformer ( step up or step down)
If it is step up it is 15 : 1 &, if it is step down, it is 1 : 15
Solve 4 both values to get V2 and look at the options whch value of V2 falls correct.
Have a nice day !
Gopi said:
1 decade ago
Turns ratio K=N2/N1
Use this formula V2/V1=N2/N1
V2/110=1/15
So V2=110/15
V2=7.3
Use this formula V2/V1=N2/N1
V2/110=1/15
So V2=110/15
V2=7.3
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