Electrical Engineering - Transformers - Discussion
Discussion Forum : Transformers - True or False (Q.No. 7)
7.
A step-up transformer steps up power.
Discussion:
12 comments Page 1 of 2.
Sandeep Shriwas said:
6 years ago
(Consider a step up Transformer).
Let the input voltage be "V".
Input current be " I".
Transformation ratio be k = 2.
So here the input voltage V = 2*V" (output).
But output current I = 1/2 I.
So, the power would be P = V*I (Consider constant power factor).
Let the input voltage be "V".
Input current be " I".
Transformation ratio be k = 2.
So here the input voltage V = 2*V" (output).
But output current I = 1/2 I.
So, the power would be P = V*I (Consider constant power factor).
RDD said:
1 decade ago
Step up Transformer means it increases the secondary voltage & reduces the current. And power is nothing but the product of voltage & current. Power is constant in primary as well as in secondary.
Kartheek said:
1 decade ago
If power factor is not consider p=vi
v2/v1=i1/i2=n2/n1
=> v2=1/i2and v1=1/i1 and the product is v1i1=v2i2 =constant
in other words if a transformer steps up voltage means step down current.
v2/v1=i1/i2=n2/n1
=> v2=1/i2and v1=1/i1 and the product is v1i1=v2i2 =constant
in other words if a transformer steps up voltage means step down current.
Sowjanyakaluguri said:
9 years ago
Transformer does not step up or step down the power its step up or step down the voltage only. And that to transformer is the constant power device.
Vasu said:
1 decade ago
Transformer is a constant power device. So voltage and current will change but product is remains same so that power is same.
Billa said:
1 decade ago
Transformer power is constant in primary and secondary.
V1. I1 = V2. I2 This is the power equation.
V1. I1 = V2. I2 This is the power equation.
Motiur said:
1 decade ago
Transformer step up and down depends on the voltage not power or current.
AVD said:
1 decade ago
Transformer power is constant in primary and secondary.
Prashanth said:
12 months ago
A step-up transformer steps up the "voltage" not power.
Anitha said:
1 decade ago
Correct step up transformer increases voltage.
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