Electronics - Transformers - Discussion
Discussion Forum : Transformers - General Questions (Q.No. 5)
5.
What is the turns ratio of the transformer needed to match a 1 k
source resistance to a 160 load?
source resistance to a 160 load?Discussion:
30 comments Page 1 of 3.
Ajinkya said:
9 years ago
I think that here is the question about the secondary side of the transformer i.e. the secondary resistance of the coil means source resistance and when any resistance is connected across the source resistance is called load resistance.
Please suggest me, if I'm wrong.
Please suggest me, if I'm wrong.
Ramjas said:
1 decade ago
Answer is A because n1/n2 = square root(z1/z2).
So Turn ratio is, n1 : n 2 = 2.5 : 1.
Where n1 = No.of primary turns.
n2 = No.of secondary turns.
z1 = Primary impedance.
z2 = Secondary impedance.
So Turn ratio is, n1 : n 2 = 2.5 : 1.
Where n1 = No.of primary turns.
n2 = No.of secondary turns.
z1 = Primary impedance.
z2 = Secondary impedance.
Historia said:
5 years ago
0.4:1 is for (Ns/Np)^2 = Zs/Zp.
2.5:1 is for (Np/Ns)^2 = Zp/Zs.
I think that both of them are correct, the only mistake is putting both of them in the choices that is why it got a little confusing.
2.5:1 is for (Np/Ns)^2 = Zp/Zs.
I think that both of them are correct, the only mistake is putting both of them in the choices that is why it got a little confusing.
Guarav Yadav said:
1 decade ago
As transformer also used in Impedance Matching,
As we have relation square root (Zp/Zs) = Np/Ns.
Given Zp = 1000 ohm and Zs = 160 ohm then.
Np/Ns = Square root (1000/160) 2.5 : 1.
As we have relation square root (Zp/Zs) = Np/Ns.
Given Zp = 1000 ohm and Zs = 160 ohm then.
Np/Ns = Square root (1000/160) 2.5 : 1.
Sukumar said:
1 decade ago
I think right option is A because we know that direct formulae rp/rs=(Np/Ns)^2
rp=1000;
rs=160;
(Np/Ns)^2=(1000/160)--->6.25/1;
then Np/Ns=2.5:1
rp=1000;
rs=160;
(Np/Ns)^2=(1000/160)--->6.25/1;
then Np/Ns=2.5:1
Stahka said:
5 years ago
The followed formula is Ns/Np = underroot of Zs/Zp;
Thus Zs si Zload which is 160 ohms and Zp is 1kohms.
Answer is 0.4:1.
Thus Zs si Zload which is 160 ohms and Zp is 1kohms.
Answer is 0.4:1.
(1)
Sarika Rajesh Banda said:
1 decade ago
N = sqrt(Z1/Z2).
Where,
N = turns ratio
Z1 = Primary impedance
Z2 = Secondary impedance
Answer is A.
Where,
N = turns ratio
Z1 = Primary impedance
Z2 = Secondary impedance
Answer is A.
Raja said:
1 decade ago
Answer is B because v1^2/r1=v2^2/r2 assuming 100% efficiency.
So (v2/v1 = (r2/r1) ^0. 5 = k = 0.4:1.
So (v2/v1 = (r2/r1) ^0. 5 = k = 0.4:1.
R&J said:
1 decade ago
Answer is c because IpRp=IsRs
therefore Is*1000=Ip*160 and Ip/Is=k=N1/N2
k=1000/160=6.25:1
therefore Is*1000=Ip*160 and Ip/Is=k=N1/N2
k=1000/160=6.25:1
Shadan said:
7 years ago
N2/N1 = turn ratio.
N1/N2 = Transformation ratio.
N2/N1=under root R2/R1.
SO 0.4:1.
N1/N2 = Transformation ratio.
N2/N1=under root R2/R1.
SO 0.4:1.
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