Question

The transformation ratio of a step up transformer is:
A) Greater than one
B) Less than one
C) Less than one and sometimes greater than one
D) Greater than one, sometimes less than one.

Answer 1

Hint: To solve this question we have to know about transformers. We can say, A transformer is a static, latent electrical gadget that moves the electrical energy galvanic ally between at least two circuits.

Complete step by step solution:
The transformation ratio of transformer is given by \[K = \dfrac{{{N_2}}}{{{N_1}}} = \dfrac{{{E_2}}}{{{E_1}}}\]
Where \[{N_1}\] and \[{N_2}\] are number of turns for primary and secondary coil and \[{E_1}\] and \[{E_2}\] are their respective emf’s .
K is the transformation ratio.
If \[{N_2} > {N_1}\], i.e. K is greater than one then the transformation is called step up transformer.
If \[{N_2} < {N_1}\], i.e K is less than one, then the transformer is called step down transformer.
Hence the transformation ratio of step up transformers is greater than one. So the right answer will be option (A). which is greater than one.

Note:
We can say, The changing current in a loop creates a changing attractive transition in a similar curl, which thus initiates a shifting emf (electromotive power) across another twisting, injured on a similar center. This electrical energy is moved between the two curls attractively without being electrically associated. The transformers are appraised in VA, KVA or MVA . Transformers are utilized to one or the other advance up or venture down the exchanging voltage. The transformers might be venture up transformers or step-down transformers relying on the essential and auxiliary windings.