Electronics - Transformers - Discussion
Discussion Forum : Transformers - General Questions (Q.No. 12)
12.
If the load doubled in value in the given circuit, what reflected resistance would the source see?
80 
400
2 k
10 k
Discussion:
18 comments Page 1 of 2.
Saritha said:
1 decade ago
Load resistance(r2)=1k ohm
but given
r2=2*r2
r2=2000 ohm
(n2/n1)=(r2/r1)^0.5
r1=2000/25
r1=80 ohm
but given
r2=2*r2
r2=2000 ohm
(n2/n1)=(r2/r1)^0.5
r1=2000/25
r1=80 ohm
Sandhya said:
1 decade ago
n2/n1= (r2/r1) only.
I do not understand how you get.
I do not understand how you get.
Sonu rana said:
1 decade ago
I do not understand how you get answer.
Mayank said:
1 decade ago
What's the meaning of (n2/n1)=(r2/r1)^0.5 ?
What is (^) in this statement?
What is (^) in this statement?
Muhammad zeeshan said:
1 decade ago
(^) means power.
Ammu said:
1 decade ago
0.5 whats this?
Resham lamichhane said:
1 decade ago
(n2/n1)=(r2/r1)^0.5
(v2/v1)=(r2/r1)^0.5
(5)=(2000/r1)^0.5
r1=2000/25
=80
(v2/v1)=(r2/r1)^0.5
(5)=(2000/r1)^0.5
r1=2000/25
=80
Captain Fries said:
1 decade ago
Sir Resham.. i would like to clarify
is (n2/n1) = (Vs/Vp)?
is it related to the equation posted by Mr. Shamray in this post??
http://www.indiabix.com/electronics/transformers/discussion-517
is (n2/n1) = (Vs/Vp)?
is it related to the equation posted by Mr. Shamray in this post??
http://www.indiabix.com/electronics/transformers/discussion-517
Mayur Chute said:
1 decade ago
Transformer ratio is given by general exp-
(N2/N1)^2=(V2/V1)....(A)
(N2/N1)-Turn ratio of transformer. of secondary w.r.t. primary
As we know, V=IR, exp (A)can be written as
(N2/N1)^2=(I2.R2/I1.R1)
I1=I2.....(as currents are equal)
(N2/N1)^2=(R2/R1)
N1:N2=1:5
(N2/N1)=(5/1)
R2=2xR2....(given)
R2=2x1000=2000ohm or 2k
(5/1)^2=(2000/R1)
solving above equation we get,
R1=80 ohm
(N2/N1)^2=(V2/V1)....(A)
(N2/N1)-Turn ratio of transformer. of secondary w.r.t. primary
As we know, V=IR, exp (A)can be written as
(N2/N1)^2=(I2.R2/I1.R1)
I1=I2.....(as currents are equal)
(N2/N1)^2=(R2/R1)
N1:N2=1:5
(N2/N1)=(5/1)
R2=2xR2....(given)
R2=2x1000=2000ohm or 2k
(5/1)^2=(2000/R1)
solving above equation we get,
R1=80 ohm
Arjun Gogoi said:
1 decade ago
Hi, we know that,
NS/NP = SQUARE ROOT OF RS/RP.
5/1 = SQUARE ROOT OF 2*1000/RP(according to question doubled the load resistance).
5/1^2 = 2000/rp(removing square root of R.H.S).
25 Rp = 2000.
Rp= 80 ohm.
NS/NP = SQUARE ROOT OF RS/RP.
5/1 = SQUARE ROOT OF 2*1000/RP(according to question doubled the load resistance).
5/1^2 = 2000/rp(removing square root of R.H.S).
25 Rp = 2000.
Rp= 80 ohm.
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