Electrical Engineering - Transformers - Discussion

Discussion :: Transformers - General Questions (Q.No.21)

21. 

In a certain transformer, the input power to the primary is 120 W. If 8.5 W are lost to the winding resistance, what is the output power to the load, neglecting any other issues?

[A]. 0 W
[B]. 14.1 W
[C]. 111.5 W
[D]. 1,020 W

Answer: Option C

Explanation:

No answer description available for this question.

Satish said: (Dec 10, 2010)  
power at output=input-losses= 111.5

Mano said: (Aug 20, 2011)  
In a transformer input power=output power

here input is 120, and some energy lost..hence output will be......Input-Losses=Output

Dhileep said: (Sep 17, 2011)  
For this we don't need to consider the secondary loss?

Pranay said: (Mar 28, 2012)  
input = output + losses
output = input - losses
output = 120 - 8.5 = 111.5

Deepak said: (Oct 18, 2013)  
Please to mention the transformer is step up or step down.

Deepansh said: (Aug 4, 2014)  
(N2/N1)>1 That is step up transformer.
(N2/N1)<1 That is step down transformer.

Eg. n2=15 n1=3.

For step up answer will be 5 which is greater than 1.
For step down answer will be .2 which is less than 1 so,
It is clear that.

Praveen said: (Jun 6, 2015)  
Please give me correct explanation for this question came in KPCL. They gave different answer that what you gave above 120-8.5 = 111.5.

But in KPCL answer key they gave different answer. And I applied the same logic as Indiabix mentioned.

Praveen said: (Jun 6, 2015)  
Please give me correct explanation for this question came in KPCL. They gave different answer that what you gave above 120-8.5 = 111.5.

But in KPCL answer key they gave different answer. And I applied the same logic as Indiabix mentioned.

Praveen said: (Jun 6, 2015)  
Please give me correct explanation for this question came in KPCL. They gave different answer that what you gave above 120-8.5 = 111.5.

But in KPCL answer key they gave different answer. And I applied the same logic as Indiabix mentioned.

Praveen said: (Jun 6, 2015)  
Please give me correct explanation for this question came in KPCL. They gave different answer that what you gave above 120-8.5 = 111.5.

But in KPCL answer key they gave different answer. And I applied the same logic as Indiabix mentioned.

Ishpreet Singh said: (Jul 24, 2015)  
Good explanation.

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