Electrical Engineering - Transformers - Discussion
Discussion Forum : Transformers - General Questions (Q.No. 4)
4.
If a transformer has 50 turns in the primary winding and 10 turns in the secondary winding, what is the reflective resistance if the secondary load resistance is 250 
?
?250
25
6,250
62,500
Discussion:
46 comments Page 3 of 5.
Bhawana Singh said:
1 decade ago
Turn ratio will proportional to square of load then square of resistance in secondary upon primary 2n square.
Yatish Ahire said:
1 decade ago
Primary resistance R1 = R2/(K)2.
Here,
K = N2/N1 = 10/50 = 0.2.
Hence,
R' = 250/0.2*0.2 = 6250 Ohm.
Here,
K = N2/N1 = 10/50 = 0.2.
Hence,
R' = 250/0.2*0.2 = 6250 Ohm.
Chintan said:
1 decade ago
N1=50 , N2=10
Turn ratio K=N2/N1=10/50
K=1/5=0.2
now,R2/R1=K^2
R1=R2/K^2
=250/0.2^2
R1=6250 ohms.
Turn ratio K=N2/N1=10/50
K=1/5=0.2
now,R2/R1=K^2
R1=R2/K^2
=250/0.2^2
R1=6250 ohms.
Vaibhav said:
7 years ago
Can I find reflected impedance or turns ratio if the only efficiency of the transformer is provided?
(1)
Sunil gorga said:
1 decade ago
v1i1=v2i2
v1*v1/r1=v2*v2/r2
(v1/v2)^2=r1/r2
we know n1/n2=v1/v2
so (50/10)^2=r1/250
r1=250*5=6250
v1*v1/r1=v2*v2/r2
(v1/v2)^2=r1/r2
we know n1/n2=v1/v2
so (50/10)^2=r1/250
r1=250*5=6250
Anil said:
1 decade ago
Resistance matching R1=(n1/n2)^2*rL
hence, r1=(50/10)^2*250
= 25*250
=6250 ohm
hence, r1=(50/10)^2*250
= 25*250
=6250 ohm
Siddu said:
1 decade ago
Turns ratio will proportional to square of load then square of resistance in sec/pri 2n square.
Sunil keshari said:
1 decade ago
N1=50
N2=10
R2=250 ohm
K=(N2/N1)
(R2/R1)=K^2
(250/R1)=(10/50)^2
R1=(2500*250)/100
R1=6250 ohm
N2=10
R2=250 ohm
K=(N2/N1)
(R2/R1)=K^2
(250/R1)=(10/50)^2
R1=(2500*250)/100
R1=6250 ohm
HJHGJK said:
1 decade ago
K=N2/N1
N1=50
N2=10
K=(10/50)=1/5
SECONDARY TO PRIMARY R/K^2
SO 250/(1/5)^2=250*25=6250 OHMS
N1=50
N2=10
K=(10/50)=1/5
SECONDARY TO PRIMARY R/K^2
SO 250/(1/5)^2=250*25=6250 OHMS
Mallikarjun said:
1 decade ago
R2' = r2/(kxk).
r2 = 250 ohms.
k = n2/n1 = 0.2.
(kXk) = 0.04.
R2' = 250/0.04 = 6250.
r2 = 250 ohms.
k = n2/n1 = 0.2.
(kXk) = 0.04.
R2' = 250/0.04 = 6250.
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