Step-up transformers are used for

Question

Question

This question was previously asked in

NDA (Held On: 10 Sept 2017) General Ability Test Previous Year paper

Attempt Online

Answer 1

CONCEPT:

Transformer:

An electrical device that is used to transfer electrical energy from one electrical circuit to another is called a transformer.

There are two types of transformer:

1. Step-up transformer:

The transformer which increases the potential is called a step-up transformer.
The number of turns in the secondary coil is more than that in the primary coil.

2.Step-down transformer:

The transformer which decreases the potential is called a step-down transformer.
The number of turns in the secondary coil is less than that in the primary coil.

EXPLANATION:

As in the step-up transformer, the number of coils in the secondary coil is more than that in the primary coil. So the electrical potential increases.
Hence step-up transformer is used for increasing the voltage/potential. So option 4 is correct.

Railways Solution Improvement Satya 10 June Madhu(Dia)

In step-up transformer, the current in the secondary coil is less than that in the primary coil.