Electrical Engineering - Transformers - Discussion
Discussion Forum : Transformers - General Questions (Q.No. 16)
16.
A certain amplifier has 600 
internal resistance looking from its output. In order to provide maximum power to a 4 speaker, what turns ratio must be used in the coupling transformer?
internal resistance looking from its output. In order to provide maximum power to a 4 speaker, what turns ratio must be used in the coupling transformer?Discussion:
19 comments Page 1 of 2.
Nishant said:
7 years ago
I think it is the wrong answers.
Because, turn ratio of the transformer is V1/V2, N1/N2, E1/E2, and I2/I1.
So, transformer transfer constant power.
V1 * I1 = V2 * I2.
V1 * V1/R1 = V2 * V2/ R2.
V1 ^2 / R1 = V2 ^2 / R2.
V1^2/V2^2 = R1/R2,
V1/V2 = Sq. Rt. Of (R1/R2).
We know that T.R:-K = V1/V2
So, K = 600/4 =12.24.
Because, turn ratio of the transformer is V1/V2, N1/N2, E1/E2, and I2/I1.
So, transformer transfer constant power.
V1 * I1 = V2 * I2.
V1 * V1/R1 = V2 * V2/ R2.
V1 ^2 / R1 = V2 ^2 / R2.
V1^2/V2^2 = R1/R2,
V1/V2 = Sq. Rt. Of (R1/R2).
We know that T.R:-K = V1/V2
So, K = 600/4 =12.24.
(1)
Suhail said:
8 years ago
Here, K^2=Z1÷Z2.
Er MAHESH said:
8 years ago
Thanks a lot @RAJESH & @Sravani.
(1)
Amani naidu said:
9 years ago
No, turns ratio is n1/n2. Transformation ratio is n2/n1.
You are right @Din.
You are right @Din.
Mouneshwara said:
9 years ago
@Din.
Turns ratio ns/np is the correct one.
Turns ratio ns/np is the correct one.
DIN said:
9 years ago
As per my knowledge.
Turns ratio = Np/Ns not Ns/Np.
Is/Ip is the turns ratio.
So, I think it is the wrong answers.
Turns ratio = Np/Ns not Ns/Np.
Is/Ip is the turns ratio.
So, I think it is the wrong answers.
(1)
Ajit said:
9 years ago
According to me, it's the wrong answer.
The turns ratio = (source impedence/load impedence)^0.5.
Answer = 12.24.
The turns ratio = (source impedence/load impedence)^0.5.
Answer = 12.24.
(1)
Mohsin Yaqoob said:
9 years ago
Simple!
Turn ratio = sqr (load impedance/source impedance).
Here load imp is speaker ie, 4ohm and source is 600ohm.
so, sqr (4/600) = 0.08.
Turn ratio = sqr (load impedance/source impedance).
Here load imp is speaker ie, 4ohm and source is 600ohm.
so, sqr (4/600) = 0.08.
(3)
Sahal said:
9 years ago
How can we solve the sqrt without a calculator? any one please suggest me.
Rajesh said:
9 years ago
Transformer transfer constant power.
V1 * I1 = V2 * I2.
V1 * V1/r1 = V2 * V2/ r2.
V1 ^2 / r1 = V2 ^2 / r2.
Sq of (V2/V1) = r2 / r1.
(V2 / V1) = sq rt of (r2 / r1).
k = sq rt of (4 / 600).
k = 0.081.
V1 * I1 = V2 * I2.
V1 * V1/r1 = V2 * V2/ r2.
V1 ^2 / r1 = V2 ^2 / r2.
Sq of (V2/V1) = r2 / r1.
(V2 / V1) = sq rt of (r2 / r1).
k = sq rt of (4 / 600).
k = 0.081.
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