Electrical Engineering - Transformers - Discussion
Discussion Forum : Transformers - General Questions (Q.No. 9)
9.
If 25 W of power are applied to the primary of an ideal transformer with a turns ratio of 10, the power delivered to the secondary load is
Discussion:
58 comments Page 5 of 6.
Relish said:
1 decade ago
Efficiency=output power/input power
output power=Vout*Iout
input power=Vin*Iin
eff=(Vout*Iout)/(Iin*Vin)
=(Vout/Vin)*(Iout/Iin)
=(N2/N1)*(N1/N2)
=1
Therefor, power output = power input.
output power=Vout*Iout
input power=Vin*Iin
eff=(Vout*Iout)/(Iin*Vin)
=(Vout/Vin)*(Iout/Iin)
=(N2/N1)*(N1/N2)
=1
Therefor, power output = power input.
Aadit Bankim Mehta said:
1 decade ago
Transformer is a static device which step up od step down the voltage level keeping power constant.
So answer is 25W itself.
So answer is 25W itself.
Ramana IIIT said:
1 decade ago
In Ideal transformer the powerloss will be zero.
Givendata:-
N2/N1=10
P1=25
V2/V1=N2/N1---->10V1=V2
N2/N1=I1/I2---->I1=10I2
Power=VI
10V1I1=10V2I2
Then V1I1=V2I2
Givendata:-
N2/N1=10
P1=25
V2/V1=N2/N1---->10V1=V2
N2/N1=I1/I2---->I1=10I2
Power=VI
10V1I1=10V2I2
Then V1I1=V2I2
Manish said:
1 decade ago
Actually in ideal transformer their are no losses. So whatever would be the input that will be output. Practically ideal transformer dosn't exist. That's why when 25w which given to it. It gives same output that is 25w.
Srinivas said:
1 decade ago
Basically transformer is a constant flux machine and also constant power machine. that's why when ever we gave to 25w power to its primary. It obviously delivers 25w to load if ideal. If not there is some fractional difference between in input and output. The Efficiency of the transformer is mostly 98%.
Arun said:
1 decade ago
In the ideal transformer power is equal in both primary and secondary.
Atul devraj said:
1 decade ago
Because transformer is ideal so power is equal in both primary and secondary.
Sunil M. Mude said:
1 decade ago
Basically for an ideal transformer in ieal condition losses are zero & its efficiency is 100%, also whatever primary side input that will be secondary output...
so the answer will be 25W....
so the answer will be 25W....
Rajendra said:
1 decade ago
In transformer constant power so their is no change in input and output power.
i.e. Answer is 25w.
i.e. Answer is 25w.
Kavitagoyal said:
1 decade ago
It is true that transformer is a static device. And it transform voltage from one level to another level, by keeping frequency and power constant. Ideal condition losses are 0 and input power=out power. In practical case losses are consider so answer is 25W.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers