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## Which coil of a set up transformer is made thicker and why?

The primary coil of step up transformer is made thicker. it is because a current of higher magnitude flows in this coil, which in turn made melt it on account of resistance. Thus, in order to lower resistance it is made thicker.

## Why do we use thick wire in primary of step up transformer and secondary in step down transformer?

When a transformer is in operation, there are ac currents in primary and secondary coils. This is the most important for the high current winding (the secondary coil of a step-down transformer). Thick copper wire is used for this winding, because thick wire of low resistivity has a low resistance.

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## Why is the primary coil made of thin wire?

If the voltage is increased the current will be decreased and vice versa. Bigger currents need thicker wire and so step down transformers have primary coils of thin wire and secondary coils of thick wire.

## What are two ways to cause a current in a coil of wire?

1. Move a bar magnet near a stationary coil.
2. Move a coil near a stationary magnet.
3. Move a coil through which current is flowing near first coil.

## How does a step up transformer decrease current?

The Step-up transformer decreases the output current for keeping the input and output power of the system equal. The amount by which it decreases the input voltage depends on the ratio of the number of turns in the primary coil to the number of turns in the secondary coil.

## What makes a high voltage transformer high voltage?

Input voltage is high while the output voltage is low. High voltage winding is the secondary winding. High voltage winding is the primary winding. Current is low on the secondary winding. Current is high on the secondary winding. Primary winding is made up of thick insulated copper wire.

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## Why do they use larger gauge wire in Transformers?

The larger-gauge wire used in the secondary winding is necessary due to the increase in current. The primary winding, which doesn’t have to conduct as much current, may be made of smaller-gauge wire.

## Which is transformer reduces voltage from primary to secondary?

A transformer designed to reduce the voltage from primary to secondary is called a step-down transformer. The transformation ratio of a transformer will be equal to the square root of its primary to secondary inductance (L) ratio.