Electrical Engineering - Transformers - Discussion

Discussion Forum : Transformers - General Questions (Q.No. 3)
3.
When the turns ratio of a transformer is 20 and the primary ac voltage is 12 V, the secondary voltage is
12 V
120 V
240 V
2,400 V
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
69 comments Page 7 of 7.

Uma.M said:   1 decade ago
We know that k = v2/v1.

Here v1 = primary voltage = 12.

Turns ratio k = 20.

So 20 = v2/12 i.e., v2 = 240v.

Ashar said:   1 decade ago
n1/n2= 1/20=vi/v2
20*12=240

Krishna said:   1 decade ago
Given, k=20 (k=turns ratio).

And primary AC voltage is 12v,

We have to find secondary voltage = ?,
As we know that, turns ratio = k = N2/N1,
K=N2/N1=20.

(SECONDARY VOLTAGE/PRIMARY VOLTAGE) = v2/v1 = v2/12,
THEREFORE,
N2/N1= V2/V1,
20 = V2/12
V2 = 20*12 = 240.

Jitendranath panda said:   1 decade ago
We know,

V1/V2=T1/T2=A2/A1.

Hear T1/T2=20, T1=12,

So V2=12*20=240V.

Varun said:   1 decade ago
V2/V1=N2/N1.

V2/12=20.

V2=20*12=240.

UDAY said:   1 decade ago
V2/V1=N2/N1=I1/I2=K (TURNS RATIO).

SO V2/V1=K.

V2/12=20.

V2=20*12=240V.

Sadasiva said:   1 decade ago
N2/N1=V2/V1
Here N1=1,N2=20
V1=12;
So V2 = N2*V1
V2 = 20*12
V2 = 240v

PANKAJ KUMAR said:   1 decade ago
K=N2/N1=E1/E2
Given that; K=20,E1=12V
20=E2/12
E2=240V

Ramesh said:   1 decade ago
Here the given data
N1=20 V1= 12
N2/N1=V2/V1

V2?= n1*vi=20*12=240
N2 ?= n1*v2/n1 =20*240/12=400

Secondary voltage = 240 volts
Secondary turn= = 400t


Post your comments here:

Your comments will be displayed after verification.