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# If the ratio of the coils of the transformers increases, will there be a decrease in efficiency?

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Introduction

Laurens Tijsseling

BRTA

Research question:

If the ratio of the coils of the transformers increases, will there be a decrease in efficiency?

Hypothesis:

When the ratio increases (from 1:2 to 1:3 etc.) the efficiency will decrease.

Theory:

If the ratio increases, this means that there will be a stronger magnetic field in the second coil. This means that there will be a greater current induced in the iron core. This so called ‘eddy current’ will oppose the current in the coil. This means that if the magnetic field of the coil is positive at a point (north pole), the magnetic field in the iron core will be negative at that point (south pole).

Middle

1. The temperature of the room

The temperature will remain constant by using the air conditioning and it will be measured each time before performing the experiment. This has to stay constant, because if not it will increase/decrease the resistance of the coils/iron core.

There will be 10 reading taken of dependent variable. This will be repeated 3 times, which will give a total of 30 readings.

The number of turns in the second coil will start at 600 turns, increasing up to 3300 turns. The change of size will be 300 turns per new reading.

Conclusion

class="c3">Amperev+/- 2%:

Voltage +/- 2%:

Power +/- 4%:

Efficiency +/-4%:

300:600

300:900

300:1200

300:1500

300:1800

300:2100

300:2400

300:2700

300:3000

300:3300

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