Electrical Engineering - Transformers - Discussion
Discussion Forum : Transformers - General Questions (Q.No. 11)
11.
How many primary volts must be applied to a transformer with a turns ratio of 0.1 to obtain a secondary voltage of 9 V?
Answer: Option
Explanation:
We know that, V2/V1 = N2/N1.
Given V2 = 9v, N2/N1 = 0.1
Therefore, 9v/V1 = 0.1
V1 = 9v/0.1 = 90v.
For more detail: Step Down Transformer - Circuit with Simulation.
Discussion:
24 comments Page 1 of 3.
Waheed khan said:
3 years ago
@All
Here is my clarification;
When K<1 use N2/N1 or Ns/Np or Vs/Vp or V2/V1.
And
When K>1 use N1/N2 or Np/Ns or Vp/Vs or V1/V2.
Here is my clarification;
When K<1 use N2/N1 or Ns/Np or Vs/Vp or V2/V1.
And
When K>1 use N1/N2 or Np/Ns or Vp/Vs or V1/V2.
(2)
Pokhor said:
5 years ago
Step up transformer. It means in ni/n2 n2 ( n2 which is the sec winding) is greater. Therefore the primary winding has to be less. The primary voltage cannot be larger than secondary cannot be, Such as 90.
(1)
Amani naidu said:
9 years ago
Turns ratio = n1/n2.
Transformation ratio = n2/n1 .
So answer is 0.9v.
Transformation ratio = n2/n1 .
So answer is 0.9v.
(1)
SADDAM HUSSAIN said:
1 decade ago
Turn ratio is N1/N2= 0.1.
V2/V1 = N2/N1 = 10.
9/V1 = 10.
V1 = 9/10.
SO V1 = 0.9V.
V2/V1 = N2/N1 = 10.
9/V1 = 10.
V1 = 9/10.
SO V1 = 0.9V.
Pokhor said:
5 years ago
If the turn ratio is less than 1, it is a step-down transformer.
Mei said:
8 years ago
Turns ratio and transformation ratio is different. Please check it.
Amol said:
9 years ago
You are right @Ram.
The hv winding turns are always more than lv.
The hv winding turns are always more than lv.
Ram said:
9 years ago
Hey @Knowledge,
If Turns ratio = (Number of turns in the have winding) / (Number of turns in the lv winding).
Then how turns ratio = 0.1?
If Turns ratio = (Number of turns in the have winding) / (Number of turns in the lv winding).
Then how turns ratio = 0.1?
Adesh thakur said:
10 years ago
I am very confused what is the turn ratio & transformer ratio tell me.
Knowledge said:
1 decade ago
Don't try to memorize it as n1/n2 or n2/n1....It may cause trouble. Get your basics right.
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