Question

If the turns ratio is 5, the secondary voltage is greater than the primary
voltage by a factor of
A.0.2
B.0.5
C.2.5
D.5​

Answer 1

Answer:

D. 5

Explanation:

The secondary voltage is greater than the primary voltage by a factor of 1/5. So, the secondary voltage is greater than the primary voltage by a factor of 1/5. Hence, this is the required

Answer 2

Answer:

The secondary voltage is greater than the primary

voltage by a factor of 0.2.

Option A is the correct answer.

Explanation:

Given Transformation ratio of a transformer is 5 = 5:1 = $\frac{5}{1}$

We know,

$Transformation \: ratio = \frac{Es}{Ep}$

Where Ep= Primary voltage and Es= Secondary voltage

Now

$Transformation \: ratio = \frac{5}{1}$

So,

$\frac{Es}{Ep} = \frac{5}{1}$

$Es = 5 \times Ep$

[Ep multiplied by 5 ]

$or, \frac{1}{5} Es = Ep$

It is clear that here

$Es > Ep \: for \: the \: factor \: \frac{1}{5}$

The secondary voltage is greater than the primary

voltage by a factor of

$\frac{1}{5} = 0.2$